While Civ 2 is arguably the instalment I've spent the most time on, it did have some weaknesses that annoyed me, for instance how so many other civs would constantly be angry with you and gang up on you as soon as you grew somewhat powerful (while they treated rivalling computer civs with utter respect when they grew bigger).
It's extremely hard designing a good A.I for games like Civ, because you have to kind of compensate for the player being able to constantly save and load. That's why they're given rule-changing advantages (like how they can suddenly produce 15 tanks the round after you declare, when previously they had none). For this reason, it'd be better not to give the player any savegames at all; then they'd be forced to play carefully and think through all diplomatic actions.
