im mostly not a fan of how they appear to work like imperators miltech system. in eu4 you at least get to pick from ideagroups, and you dont have enough slots to get every ideagroup so you gotta make them count and pick the right ones. just being able to get all of it and balancing that by making it expensive is kind of a boring gameplay experience
also, honestly, having a bunch of linear paths restricts developers as well. you gotta make everything fit a theme and you cant put in a neat inventive perk just all on its own because it doesnt synch up with everything else. im absolutely certain some of the end perks will not be worth it, or therell be whole lines that have a single good perk and the rest is trash so you generally dont touch it, just because of how limiting the system is to work around. i think a better system would be to have, like, a limited number of perk slots to choose from, and perks of varying price depending on how good they are. you could replace them at any time by spending a mixture of cash, renown and prestige, justified in-universe as a sort of propaganda campaign to get people thinking about your family differently. therell still be some duds, of course, but its less egregious when you dont HAVE to pick them just to get at the good ones that you actually want
in an ideal world youd also have to perform actions ingame to unlock them, since how are you supposed to be a family known for something no member has ever done, but im not holding my breath on that one. even though itd be really cool to also have something like negative "perks" that unlock and apply automatically by doing evil tyranny shit all the time or constantly engaging in incest or whatever that youd then have to work at undoing (think the targaryens if you want to put it in asoiaf terms). i mean the ai could really fuck you over on that one though so maybe thats a bad idea actually
anyway my point is i agree its a neat concept with a lot of potential, i just think the implementation needs another look. games not out yet though so who knows, maybe itll be fine and im worried about nothing