So with 1.09n, we can now build as many Studies, Arcane labs, Workshops as we can afford.  Also, we get income from taxing populations.

I got to thinking: you could add an interesting layer of complexity to the game by giving bonuses for organizing cities. 

Like, bonus for building "neighborhoods" of adjacent bonus buildings... what if you could upgrade a block of 4 Studies into a Think tank, (or 4 Arcanes into a Mystic College, etc.)?  Something to reward specializing cities.

Also: buildings that increase/adjust tax collection