Byzantium? I mean, that's not disputable given the interests of EU players, but it's pretty odd to give extra attention to a nation that should be swallowed up in the beginning of any game that follows a semi-historical path.
And given that BYZ is in, I'm surprised the USA isn't. I'm guessing that means the "late 18th century" = 1776.
Neither BYZ nor USA belongs. They just didn't exist long enough, in game terms. In an earlier game, obviously BYZ would be key; later, we would.
Other than that, I think it's a reasonable list. I'd replace Byzantium with Oman, though. Look at what they did in the 17th-18th C. There weren't many non-European nations which EXPANDED in areas the Europeans were active.
But then, that's what mods are for.