What if walled city attacks were removed entirely but were left on encampments? -On higher levels you wouldn't have to fight in the gaps between cities because your rival is one era ahead of you. -The AI might actually stand a chance of being a domination threat with the huge armies they now build. Currently the AI armies are just wall fodder in the mid to late game. I think it would make the game a hell of a lot more dynamic. It would be great to have this as an option in game setup. In my mind the game really suffers from OP city defenses.