Modern architecture style, High tech style and post modernism styles are also American styles. All three are styles of skyscrapers. This got a bit off topic. To get back on topic I would rather that every civ have no abilities and be balanced than for a particular civ to be more powerful in game than another because of how it defined the real world. I don't play games to make the real world, I play them to make my own world. Someone mentioned that to play as Rome you have to sacrifice focus in 1 area to utilize its UA and UU so I think if I had to vote again I would say its just right rather than upper teir. I still think there are other civs that need brought up to par or nerfed.