I'm on holiday now, so I'll be playtesting DoC quite a lot for a week and a half.

In my last game with the US I was impressed at the state of the world : it was all historical or historical enough (Mexico was controlled by England, but they respawned in the 1800's so it was alright). There were two cities in the Caribean islands (Martinique and Road town by France and England), France controlled Guyana, Madagascar with the Portugese, New Orleans. The most impressive sight was an almost totally controlled Europe : they had conquered Russia and Scandinavia, and Amsterdam only had 2 tiles to work.
Maybe I was just lucky, but you really made a great job for worlds like that to be possible.
Do you want me to test anything specific ?