Is there a reason the AI stops expanding? Seems like I'm building a good chunk of cities and keeping them happy but the AI only has 3-4 cities each. I play at diff 5 and didn't have that problem before installing BNW but I previously just edited some stuff in the xml files and they started expanding more aggressively. It's been a few years though since doing that and I don't remember what I all did and don't really want to do it again because I prefer the stock version if I can find a solution.