One thing I find a bit underwhelming is that your capital is often just another city. I mean, sure, nobody can burn it down, it has 3 extra defense (lol), and has like 1 more housing and some base yields but those are necessary to even play the game with. Past the early game the capital doesn't really have much value outside of a domination victory. So maybe the capital could get more boosts early on. At the same time, I think a stronger palace would also help offset bad starts, especially coastal starts or ones without luxuries. Likewise with the goverment plaza. Right now, I see the Government Plaza as more of a "dump district" where you just crank out the buildings for abilities and promotions but the actual placement of it really isn't that important. The thing about a district that improves other districts is that you need other districts near it to begin with. Of course, these things if done too heavy handedly could devalue the importance of playing your start and Autocracy could already be considered too good already. I really think they should do something about Republic, but .... I guess it comes down to housing being incredibly oppressive early game, which I think is actually a design intent as it would take time for people to be able to develop ways to have big cities but currently a lot of players simply ignore it completely and don't grow past size 6 which kinda tosses a lot of the game away.