I agree. Let's have an open discussion about that after release. If I forget to mention this point in my 1.15 retrospective post then please remind me.
I think it would also be good to discuss respawn names and locations. For example, maybe Mali should be "Nigeria", Kilwa should be "Kenya", and Congo should respawn as Angola. That way African modern respawns can be represented by Africa's major regional powers (ie -- Ethiopia, Kenya, Angola, South Africa, Nigeria, and we can discuss more if more African civs come out) There's no reason to give them their own UHVs or make them playable, but it would be a nice touch to have them respawn in modern times in a semi-historical way.