Something to bear in mind, all strategy games, and especially grand strategy games, suffer from the "snowball effect" whereby the game becomes easier the bigger you get. Admin Cap, as originally designed, was an anti snowballing feature, whereby the bigger you got, the more expensive your research and traditions got. This was imperfect but more or less worked.
However, the addition of bureaucrats more or less broke that system and eliminated the "braking effect" admin cap had on the game, and made it even easier to tech rush (such that now you can get through the entire tech tree in just 60-80 or so years). Bureacrats made the game less balanced, not more, by eliminating one of the games few brakes on growth.
Bureacrats can still be saved, but it would require making them less effective, more expensive to maintain, or add other negatives to being over admin cap.
But ultimately, the way admin cap is now designed, small empires often are more effected by admin cap than very large ones, so it no longer serves its original intended purpose.