It's actually a pretty tough question.... the size difference between Midgar (including, crucially, unseen Midgar) in the OG is massive.

All the other towns are small, and there are no other cities.

I think the problem with expanding them with detail is not using too much overt filler.


Having said that, Cosmo Canyon (for it's natural beauty) and Wutai (because it SHOULD be bigger, and has been mentioned several times already in remake) for sure. For a third it's tricky, because it feels like most others are more like villages. I think a North Corel COULD be interesting, but it might just turn out looking almost exactly like the midgar slums. I always liked Mideel, and it might be nice to the before and after of this town in remake scale.