A feature Request

Hi, I was wondering if there was a way to limit the amount of cities a player and npc can build to a particular number?

If not, then I would like to request a feature where we can set the amount we want each faction can have.  This way, the only way a faction can have more city after hitting its limit is to conquer one.  And since the faction that has lost a city have less than the limit, he can build a new city.

I think this would make multiplayer fun and force some diplomacy.  Single player would seem more epic in a huge world.

What does everyone think?