I personally feel like they've been pretty creative with the new Civs. I've also found Bull Moose Teddy - with his appeal and National Park based strategies; Ethopia - with a faith-based trade and improvement play; and Babylon's eureka chaining science a lot of fun and different play. Celts are pretty creative as well, though they haven't done as much for me. Byzantium and Gran Colombia have been more straightforward/meh for me, but I'm also less of a domination player in Civ. Gathering Storm had the Maori as an extremely creative design, but outside of them it's a similar mix of more creative and less creative. And both are leagues better than Rise and Fall's "every casus belli is a UA" designs.