1) Poor Central Asia, it had many great civilisations. Tamerlane, anyone?
2) You forgot about Peru/Ecuador - Inca
3) Syria should be covered since Damascus is one of Arabian cities
5) New Zealand also probably should be included as some kind of representation of Polynesian civ (Maori unit). Not sure about Norway (Norwegian Ski Infantry), Finland (Hakkapeliita), Iceland, Greenland, Algieria (Moroccan and Carthaginian civilisations)
6) Poor Balkans
7) Poor Africa (although it didn't have very much great civilisations, Kongo would fill this void perfectly