Thats an idea i got when i woke up this morning. For each civ they can add one or maybe more city improvement unique for each civ. That will differentiate a bit more the civ. They can add one unique wonder too... :cool: What do u think about that guys? :scan:

A unique city improvement sounds like a decent idea, providing those improvements do not unbalance game play.

Wonders - no. every civ should be able to build every wonder.

Unique Buildings - could be a good idea.
Unique Wonders - The only way I would see this working is trait specific wonders.