Some good and some bad that will need to be gameplay tested to see the true power of the Civ, IMHO.
I have enjoyed playing the Maya in previous iterations of the game and I find their culture and history fascinating.
I like the fact that they tried to imitate the Mayan City State structure with the capital and cities radiating out around it.
Unfortunately, you are going to end up with a weaker capital and stronger secondary cities which doesn’t make sense. If that would have happened historically, that City State would not have lasted long before it was subjugated. Perhaps they need to buff the Capital, somehow.
I like that farms will be important as in my games, I usually build a lot of them. Maybe not the best gameplay move but I like the look ascetically.

It is nice to be freed from settling on rivers but that means that you won’t be able to build a water mill so if you get some rice or wheat, they will not be as good as they can be. Perhaps that is my gaming OCD but it bothers me.
I don’t mind the -15% malus for cities outside of the 6 tile range of the capital. It’s not that crippling and it is a darn sight better than the horrendous corruption mechanic in Civ III. Lol.
The unique unit is excellent and I do like playing a turtle game from time to time.
The observatory is also excellent. While not as strong as Korea’s Seowon, it’s still powerful. I find Korea horribly dull to play so it’s nice to be able to have a more interesting alternative. Would have been interesting to get an interaction with Holy Sites, though.
I got a distinct A Minotaur feeling when I watched the animation. I do hope they change that. Not a deal breaking for me as I play a fair bit on my iPad and there are no animations for that version, but I think if the season pass is going to be $40 for the PC, they can do better than that.
I like the new resources. Corn/Maize is cool and I am very happy to see Honey. I love bees and honey. Now they just need to bring back Peat from Civ II.
All in all, I am pleased with the Maya. I think they’ll be very interesting to play and aesthetically, one of the best. With their colour scheme and farms covering the countryside, it’ll look beautiful.
