Surely, but then we talk about the country and/or it's rulers again, instead of the civilization itself.
Macedon is also a very bad choice in my opinion, with Greece already in I would have never included it.
In my ideal world none of these would appear as full civilizations, only in various scenarios in one form or another.
In fact, this would be my ideal list of full civilizations:
Europe:
Dutch, England, France, Germany, Greece, Hungary, Norse/Vikings, Spain, Poland, Portugal, Rome, Russia (Celts, Byzantium, Norse split, Bulgaria)
Africa:
Egypt, Ethiopia, Kongo, Mali, Morocco, Nubia (Carthage, Songhai, Zulu, Swahili)
Middle-East:
Arabia, Armenia, Assyria, Babylon, Hittites, Phoenicia, Sumer, Turkey (Israel, Georgia)
Asia:
China, India, Indonesia, Japan, Khmer, Korea, Mongolia, Persia, Siam, Tibet, Vietnam (Burma, Khazaria)
America:
Aztec, Maya, Inca, Cree, Iroquios, Sioux, Pueblo (Musica, Mapuche) (Haida, Apache)
(Civs that appeared in the series before, but I would never include them again: Native America, HRE, USA, Brazil, Australia, Venice, Austria, Macedonia, Huns, Scythia, Polynesia, Shoshone)
I would definitely include all those 44 civs without a parenthesis. (let's do not take controversies about Tibet, Pueblo, etc. into account)
Instead of the Cree the Haida or other northern native american civ might appear though.
If there is still room, some might also get in from the ones in parenthesis. A couple examples (and in some case the reason why are they are separated from the main civs):
Adding a couple more native american civs, especially in the south. I'm not that well-versed in the area, maybe there are better options
Splitting the Norse civ into the separate 3 counterparts. It's probably a valid request, altough it does take 2 more slots.
The Zulu is a fairly bad choice, but not that bad either, and a series staple. If there is room, they can get in too.
But the most interesting question is that where is the line between civs, when can they be considered separate. Do Byzantium, Carthage, Songhai have a place if Rome+Greece, Phoenicia and Mali are already in? If yes than I would like to see them too.
If there is still room for a European civ, I would choose a civ from the Balkans: Bulgaria or maybe Serbia.
And finally, put Georgia on the list, based on all the various options I read today. If all the others mentioned above are in, and there is room for a 2nd civ from Caucasia, why not