I think my biggest gripe at this point is still the pollution - it's hard enough trying to work on land improvements (esp. clearing forests to build cities) - it's more of a bother to always deal with pollution popping up, esp. at your developed cities at the end, when it just slowly kills of your population - in past civ games, I've personally just tried to eliminate pollution altogether (or at least the best I can, making a bunch of improvements, wonders, anti-pollution, at least to counter the natural pollution production). I can't seem to be able to change marshes or jungles into other terrain types, despite learning Ecology. Otherwise, the end's pretty interesting - the tech tree lines seem a bit... "interesting," although the new units are a refreshing change - oh yeah... apparently you can research smartest weapons before smarter weapons, or whatever the tech is called. Maybe as a reward for reaching the end, there can be some special wonders - maybe ones that give you certain improvements for all cities - thus, modern/future age city building isn't tedious, with the constant need to build harbors, granaries, aqueducts, etc. Good job though, although I have yet to finish up the game - Took out the Koreans, Japanese, and Indians. At first I wanted to play peaceful... but I want to connected my empire Persia and the Turks (Ottomans) split my Eurasian kingdom in half.