TL: DR: Please don't lock psionics (and, I believe, cyborgization and biomodification) to one ethos wholly.
Well, I believe I better sum my thoughts here, not spamming dev diary post.
In short, in Utopia being psionics is bound to spiritualists - you should take a perk to unlock psi path, and said perk is opened only for spiritualists. Truth to be said, I believe it's not the best solution.
1st reason category is fluff, of course. In nearly every sci-fi franchise I know being psionic isn't locked to some spiritual person, you don't need to find a divine-based transcendence to achieve it (that's why it isn't space magic!). I believe Stellaris universe is kind of mesh of classical sci-fi (I'm not trying to say it's bad! it's awesome!). So let me show some examples.
Well, I believe I better sum my thoughts here, not spamming dev diary post.
In short, in Utopia being psionics is bound to spiritualists - you should take a perk to unlock psi path, and said perk is opened only for spiritualists. Truth to be said, I believe it's not the best solution.
1st reason category is fluff, of course. In nearly every sci-fi franchise I know being psionic isn't locked to some spiritual person, you don't need to find a divine-based transcendence to achieve it (that's why it isn't space magic!). I believe Stellaris universe is kind of mesh of classical sci-fi (I'm not trying to say it's bad! it's awesome!). So let me show some examples.
B5. Actually one of the best examples of unspiritual psi at all - you must try very hard to put Bester and Psi Corps into spiritual aestetics. They're not clerics or philisophers, they're people with materialistic agenda - they want power and resourses, not union with divine. They created god-level entity, because telekinesis allow to kill without any evidence. And with Psi Corps building B5 will be first thing every person who saw series will remember.
Star Wars. Actual psionic force is granted by, as you can select canon, actually existed force field or symbiotic microbes. But anyway, you're not enlighten yourself into force user, you're one or not.
Warhammer. It's kind of tricky, because actually nearly any human character actually shown in game is spiritual - no matter is he actually psyker or not. I mean, he is religious, and he definitly believe the world have some grand reason and order (I actually think it's defining feature of spiritualism, in-game and quite in-real-life). But by fluff we have there is a fact - anybody who have psyonic potential can be psyker, no matter what're his own thoughts about it. He can be atheistic and materialistic (and heretic... or Emperor himself), but psy potential would be here.
Stargate - well, Ancients looks like spiritual people, five's up, and looks like some kind of philisophical training is required to get ascension. But you don't have to be somebody spiritual just to get telepathy or telekinesis.
Actually if you look into old-fascioned sci-fi, it's even brighter.
StarTrek - everybody who survived moving through Galactic Barrier takes Ascension (and bad, bad attitude). Gods and demons actually are powerful people who have mind powers and nasty habits, no some "higher people". The best example of higher plane creature is Q, and Q Continuum is technological-, not spiritual-based. Vulcans are spiritual, but mind meld ability isn't connected to their spirituality, it's physical. Betazoids aren't spiritual as well - and it can be even said when their telepathic abilities hidden.
Azimov's Foundation says that, hillariously here, you should be rational and non-spiritual to be psionic - it's a technique that demands full control to your mind (and some inborn abilities).
'Doc' Smith Lensman Saga defines that psi abilities are rare gift; and one of most powerful psychic race (Eddore) is quite an essence of materialistic world look.
I can continue, but I believe you got my point.
Star Wars. Actual psionic force is granted by, as you can select canon, actually existed force field or symbiotic microbes. But anyway, you're not enlighten yourself into force user, you're one or not.
Warhammer. It's kind of tricky, because actually nearly any human character actually shown in game is spiritual - no matter is he actually psyker or not. I mean, he is religious, and he definitly believe the world have some grand reason and order (I actually think it's defining feature of spiritualism, in-game and quite in-real-life). But by fluff we have there is a fact - anybody who have psyonic potential can be psyker, no matter what're his own thoughts about it. He can be atheistic and materialistic (and heretic... or Emperor himself), but psy potential would be here.
Stargate - well, Ancients looks like spiritual people, five's up, and looks like some kind of philisophical training is required to get ascension. But you don't have to be somebody spiritual just to get telepathy or telekinesis.
Actually if you look into old-fascioned sci-fi, it's even brighter.
StarTrek - everybody who survived moving through Galactic Barrier takes Ascension (and bad, bad attitude). Gods and demons actually are powerful people who have mind powers and nasty habits, no some "higher people". The best example of higher plane creature is Q, and Q Continuum is technological-, not spiritual-based. Vulcans are spiritual, but mind meld ability isn't connected to their spirituality, it's physical. Betazoids aren't spiritual as well - and it can be even said when their telepathic abilities hidden.
Azimov's Foundation says that, hillariously here, you should be rational and non-spiritual to be psionic - it's a technique that demands full control to your mind (and some inborn abilities).
'Doc' Smith Lensman Saga defines that psi abilities are rare gift; and one of most powerful psychic race (Eddore) is quite an essence of materialistic world look.
I can continue, but I believe you got my point.
So, there is no fluff requirements for psionics in classical sci-fi that requires psionic be hard-locked into Spiritualist ethics to start with. But there is also gameplay problems - as Wiz himself said, "Distinct ethics that have their own unique playstyles." That's a totaly valid, very important point (sorry my arrogance I'm speaking about developer option like that).
But I'm not believe it's an issue here.
Thing is, in Utopia you can change your empire ethos. So, if I got it right, it should be quite viable to play around hard-lined block ("only spiritualists can take this!") - you take spiritualist ethics, takes a perk, gain it's benefits and change around again. Of course, one can just block using psi when you're non-spiritualist, but it looks kinda silly ("you had psi potential day ago, but after military coup this potential just vanished!"). Also in global mind... If you can't always fully control your pops ethics change (and by stream I got that idea, and that's actually great, please don't change it!), you can find yourself in a situation when your empire build around unique playstyle, and situation builded quite opposite way. I firmly believe unique playstyle to that you need to pay, should be a boon, not a penalty. If such a bonuses can be retained through changing ethos, all blocks became hillariously unnesessary.
But I'm not believe it's an issue here.
Thing is, in Utopia you can change your empire ethos. So, if I got it right, it should be quite viable to play around hard-lined block ("only spiritualists can take this!") - you take spiritualist ethics, takes a perk, gain it's benefits and change around again. Of course, one can just block using psi when you're non-spiritualist, but it looks kinda silly ("you had psi potential day ago, but after military coup this potential just vanished!"). Also in global mind... If you can't always fully control your pops ethics change (and by stream I got that idea, and that's actually great, please don't change it!), you can find yourself in a situation when your empire build around unique playstyle, and situation builded quite opposite way. I firmly believe unique playstyle to that you need to pay, should be a boon, not a penalty. If such a bonuses can be retained through changing ethos, all blocks became hillariously unnesessary.
So what's my idea? I believe you shouldn't block entry ascension perks (there is two of them for ethic-based takes - entry and finisher) to your ethos, but set a taken perk as a great ethic boost for your population. If you taken first level Psi perk as a spiritualist - hurray, such a thing will improve your empire ethic unity. But if you're not spiritualist, you would get a big drift into Spiritualist - and until you can make your spiritualists in empire happy, you'll be in problem. And you should be a spiritualist to take second step. At least I believe it's the very idea beyond faction system - that you need to balance your politics. So to get full benefits from some playstyle you should to have such ethic, but without it you can get "teaser", to check if it looks good in your current playstyle. Yeah, that mean you can have partially cyborized biomodded psion (who said "Space Marine Librarian"?!), but with this came with drawbacks - you'll have some powerful factions, and two of them are dislike you for prefering third. Maybe it's even possible to create Ascension Wars, when your population actually starting fight each other to find whose path is right!
Why I believe it's good idea?
Well. First of all, I believe it's good for gameplay. I think if we have a mechanism (and we will have in Utopia, hurray!) that will tune our empire onto our playstyle, why not? I hate solid blocks, such as "hey if you're xenophile you can't do anything at all with primitives, and to hell you're also militaristic and materialistic". Let me do something with such a sphere, not just say "hey, there is a big sphere for you, but it just locked for you entirely, because you taken a bad ethic in the start". Also I don't actually want to meet a situation when I need to play through half a game just to say "ok, I came to the point my playstyle opens fully, and it's meh for me". Also as I haven't full control for situation in-game, I think it's fair to let player change his playstyle dynamically, not select one from the very beginning and use it until the very end.
Secondly (and more important for me personally), I believe it's better for game stories. In a current system you can't actually have B5 situation with psions meeting distrust. You can't have a story with development of psi changing your society.
Well. First of all, I believe it's good for gameplay. I think if we have a mechanism (and we will have in Utopia, hurray!) that will tune our empire onto our playstyle, why not? I hate solid blocks, such as "hey if you're xenophile you can't do anything at all with primitives, and to hell you're also militaristic and materialistic". Let me do something with such a sphere, not just say "hey, there is a big sphere for you, but it just locked for you entirely, because you taken a bad ethic in the start". Also I don't actually want to meet a situation when I need to play through half a game just to say "ok, I came to the point my playstyle opens fully, and it's meh for me". Also as I haven't full control for situation in-game, I think it's fair to let player change his playstyle dynamically, not select one from the very beginning and use it until the very end.
Secondly (and more important for me personally), I believe it's better for game stories. In a current system you can't actually have B5 situation with psions meeting distrust. You can't have a story with development of psi changing your society.