[J Henry Waugh]

I would love to see Dom 3 engine on a "Evolution of Civilizations" model/theme (inspired from Carroll Quigley, google it, you can find PDF of the book available).

And instead of magic / religion / military, a 6 tiered model on

Military - armies, navies,
Political
Economic - depending on terrain, broken into agriculture, mining, commerce and as evolved, fabricated production
Social
Religious
Intellectual - science

Each of the 6 axis influencing the civ, i.e., religion affecting population, social affecting "happiness"/culture/"dominion" spread, military the act of "manual" conquest, economic the output of food and resources, intellectual for technology breakthroughs, etc...

Sounds like a lot Civilization series, but I like the Dom 3 "province" model much better.