How are specialist subsidies "barely worth using"? 0.3 alloys or 0.6 consumer goods for 1 energy credit is not a good trade? And that doesn't even factor the alloy nanoplant, civilian repli-complexes and the orbital rings buildings, with those you are getting 0.6 alloys or 0.9 consumer goods for 1 energy credit. That surely is "very strong".Aside from basic resource subsidies and ambitions, what 'very strong' unity edicts are there? Specialist subsidies are barely worth using even if you have the edict fund, and the rest are either only situationally available or give only moderate benefits.
I never said that 100 edict fund in the early game wasn't strong, in fact i pointed out earlier that executive vigour and imperial cult are among the strongest ap/civics in the game.100 edict fund in the early game allows you to run two or three basic resource subsidies at a time when you have maybe +50% resources from jobs and lots of workers, so you get the maximum effect from those edicts. Using those edicts later will have diminishing returns because of all the +% resources from jobs modifiers that accumulate over the course of the game.
Also, +100 edict fund per planet isn't the same as infinite edict fund, even if it is a lot. As an example, in my current game (in the late game) I would need 24k monthly unity or edict fund to run every unity edict and ambition at once, but I only have around 100 planets (for potentially 10k edict fund with the first league building). How many edicts this building allows you to run depends on how efficient you can be with sprawl.
You might not be able to run all edicts but you can certainly run most, probably all, of the subsidies and ambitions, which is already insane.
Yes that is the relevant question to truly assess how strong the Cybrex building is. However keep in mind that you're getting most of your minerals from jobs, not stations, so even if you build it in most good systems, which will already require a very large number of starbases, you're only buffing a subset of your mineral production, now compare that to +83% miner output from edicts, which results in +6.64 minerals per miner lategame! Are you truly not convinced that the first league building is much stronger? Again i'm not saying that the Cybrex building is not strong, it is, but at least it's not insanely broken.You won't be able to build the Cybrex building in every system, but you will be able to build it in every good system. The real question there is how many high mineral or strategic resource systems (and nanite deposits) you can get, and how that compares to the edicts you could run.
The same for the Vultaum, it's strong for sure, but not as broken. With the science edicts you are getting +30% research (additively), so +1.2. In the lategame your reseachers produce maybe 15 research of each type, so you're getting ~8% increase to research production. With only two edicts you already have roughly half of the bonus that the Vultaum provides, and on top of that you can get +6.64 minerals per miner, +5 influence, +4.5 energy credits per technician, +0.6 alloys per metallurgist and +0.9 consumer goods per artisan, and you'll still have edicts fund left!