Unrelated, but have you heard of realistic growth and travel? Its a mod much in the same vein as your collection, main features right now being faster pop growth in provinces with more empty space, a meiou style CE (reducing tax/manpower based on travel time from capital to province via land/sea/river), more realistic food production (food being only generated by pops, not just empty farmland, first pops produce a big surplus, which decreases with each pop as they have to farm more and more marginal farmland), provincial wealth which can increase and decrease based on production/looting, taxation laws, and aministrative capacity being generated by integrated nobles/citizens and demanded by all pops, reducing loyalty in provinces if you cant handle the administrative burden of your expansions.
Point is, the both of you seem to be working in the same direction, making the game less click button get thing and more like a living world with systems you can nudge with cascading effects that (hopefully) go your way. Would love to see what you can do by your powers combined