Had some more time to play with it. Got my head around the basic combo mechanics, now I just have to learn the team combo mechanics. Which is going to be a pain because I always forget that this is a team game and end up playing as if I only have one character.
But as far as basics go it plays like a more accessible SSF4, which is great for me because I couldn't get into that game at all. And just like SSF4 I've naturally taken to Chun-Li. Don't know what it is about her play style but I'm always instantly at home with it. Plus she has triple jump and air dash in this, which is a bonus. Can't combo out of spinning bird kick though, or at least I couldn't figure out how to, which is a shame, since buffering the charge is a lot easier in this game.
No idea who I'll end up with for the rest of the team. I've only really tried Joe, Ammy and Wolverine.