With high enough autonomy, will provinces start building their own stuff just like the colonies?
Would be a neat side effect if, CK-style, the provinces used the money they didn't give you to improve themselves.
Wouldn't that involve programming a personal treasure and AI for each province? Seems like way too much work for EU4 though I can see it as the kind of change that would involve a lot of recoding and optimization...maybe a potential major feature of EU5?