Holy Rome - having Holy Rome and Germany at the same time feels more than odd; just contrasting the HRE and Imperial Germany for length/depth of history seems arbitrarily since the ingame German civ encompasses a lot more, including most of the HRE.
Similarly, I agree that Babylon and Sumeria should be one civilisation.
America and Native America independently both have issues that would disqualify either. America is too young and in many ways not distinct enough from British culture... its importance in the 20th century would, however, mean that its absence would be very conspicuous. Native America runs into issues related to permanent settlings, unified leadership etc; I suppose the developer felt casting them as Barbarians would be in bad taste, even though that would have been the most sensible course in-game.
Similarly, I agree that Babylon and Sumeria should be one civilisation.
America and Native America independently both have issues that would disqualify either. America is too young and in many ways not distinct enough from British culture... its importance in the 20th century would, however, mean that its absence would be very conspicuous. Native America runs into issues related to permanent settlings, unified leadership etc; I suppose the developer felt casting them as Barbarians would be in bad taste, even though that would have been the most sensible course in-game.