Canada, while still gimmicky, is nowadays very strong on tundra and will be drawned towards it rather than looking at it only like a possibility if plains are already taken.
Khmers kept their theme, but are now strong with it! They bonuses revolve around gaining massive pop and having massive pop. Truly good synergy.
Spain is now stronger than ever. Sure, they are still very "other continent" dependent, but don't forget the +3 gold, +2 faith and +1 production for every trade route, including at the beginning. Sure, it doesn't scale as much as Portugal, but they will have a very strong start. We finally have a true colonial civ, with cities on other continents will be wonderfully efficient.
Also, the free Eurekas and Inspirations from wonders is good for China, and synergizes well, and maintain Qin SHi Huang as a wonder builder throughout the ages. Very good indeed.
Small change for Georgia, but after all they were changed so many times that they were already kind of strong. But for me, the most hopeful thing is that maybe they definitely get rid of the casus belli abilities!!!