So I've been playing a game as the Kryll, for about 8-10 hours when I unlocked the 4th pragmatic ideology in the Vigilant line. The description of the ideology is "All planets receive 3 free defending ships." I think this ideology is too powerful.
Granted I probably had the most planets out of all 6 civilizations, and I was playing on the largest map type, but my military skyrocketed from about 200k or so power to over 600k. The three factions that had declared war on me but that I had barely seen, were suddenly eager to agree to peace treaties with me, giving me all their technologies, credits and giving me probably more credits per turn than they earned. It did have some downsides though, because my income went from way past +100 per turn to -120 per turn.
This ideology is way too powerful, it made me the biggest power in the game, from being the second smallest in terms of military power, gave me peace with everyone and would bankrupt me if I didn't have a lot of credits stored. It barely has any downsides too it, as the delivered ships are all up to date with my latest tech and not outdated.