It is super early to tell. Only the hardcore theorycrafters have really taken a hard look at the deck shifts so far, so you can't really say that there's a meta yet.
That being said, early data is showing a few promises. Other than the new hunter there seems to be some minor shifts to the other classes.
Spell Hunter I can make this, but not sure I want to spend the dust on it yet. But, it's top-o-da-heap at the moment. New meta, for sure.
Zoo Warlock Relatively unchanged. Just adds a new 1-cost card draw/life tap, 2-cost taunt/life tap, and a 7-cost that shrinks.
Aggro Paladin Really new, to me at least. I can't even come close to making this.
Dragon Priest Tested this out myself and while I can see the potential maybe I just don't know how to play it. I did poorly.
Secret Mage Secret Mage was always my stand out deck when I play manually, and now it's even better. Earlier free secrets, a secret that damages both minions and heroes, and legendary card draw weapon. Does amazingly for me manually, not so much with the bot.
Tempo Rogue I don't have Edwin VanCleef, not sure I'll ever make him, otherwise I'd have this deck. Bot doesn't always combo, though, and not sure what custom changes could make that work very well.
Decks listed in order of manual play win-rate, one per class. Decks are also changing
hourly, so don't get set on anything here. The other classes don't even break top 15 right now, while any variation of the Spell Hunter is in the top 1-4 at any given time. I might bite the bullet and make it, but I can always wait it out.