Georgia's second main problem is that it was an overplayed joke that was turned into a civ most didn't want in the game
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And yet, if it weren't essentially a meme in the first place, I (and many others) probably would have been less bothered by it's inclusion.
I've become a big fan of Georgia, and definitely prefer to play as them over any other civ.
One issue they had was their unique unit was on a leaf tech, which has now been fixed.
Another issue was that walls, other than ancient walls, weren't needed to defend against the AI. If anything, that's probably more true as of GS, since now wall strength is doubled. Unless there's some change to siege warfare that we don't know about.
The double envoys to City States should be more useful post GS if city states survive longer, which means more gold (with Georgia, the gold per envoy card is a pretty good diplomatic card option) and more favour.
Overall, Georgia should be more fun to play as of GS.
Phoenicia is probably the new civ in GS I'd be most inclined to gravitate to. I rely on trade as the backbone of my economy, so more trade routes is appealing to me. Plus defending a long snakey civ stretched out along a coastline sounds like it could be interesting if you're attacked by an inland neighbour. I don't find conquering the AI fun, but playing peacefully while defending against neighbouring aggressors I do enjoy, and sticking to the coast as Phoenicia could create an oddly and inefficiently shaped empire.
Speaking of which, one small issue for Phoenicia is that, with the new power system, there will be even more of an advantage to having a circular empire. Obviously, Phoenicia can build inland cities as easily as anyone. So, a bit like Canada with its modest tundra boost, just because Phoenicia gets a benefit to coastline doesn't mean you should stick to the coast. Most efficient play will likely be to build a normal empire, for which the coasts are just a little stronger. More interesting play will likely be to build long, stretched out coastal empires.