Anyone who complains and 1UPT hasn't played a MP game. Yes, in SP 1UPT is bad because of AI, but when you play against humans you need to use tactics and think about logistics and how to move effectively. It's just a lot better. I used to think Civ 4 was a better game but once I started to play MP Civ 5 I turned. The only way I could see stacks working is Civ 2 style. That is you can stack as many units as you like BUT if the defending unit of the stack dies so does the ENTIRE stack.