I have to say, in the few battles I've played so far, I certainly enjoy this metagame more than than BW OU. BW2 has brought hard hitters, some good utility mons, and a bunch more variety. I don't think I'm alone in appreciating a VoltTurn-less metagame, and hopefully that can continue as long as possible. Right now, I'm finding good cores to build around, and I've already come up with a couple good ones. I play semistall primarily, and having a good defensive core of 4 or 5 Pokemon is essential to my playstyle. I started around the fabled Heatran/Slowbro/Amoonguss core, and added to it. What I find the core appreciates is Wish support, and there are a couple of candidates that stand out so far. Blissey is fantastic as always in this metagame, and helps to counter both Tornadus-T and Thundurus-T. However, I think that Salamence is also a fine candidate that can more easily pass Wishes to Heatran while also having Intimidate for extra utility. Also, on my teams I like to have both a Spiker and a spinner if at all possible. Forretress can accomplish both, and its ability to take Outrages can compensate for using Salamence over Skarmory. Of course, you can't go wrong with adding SkarmBliss either, since they accomplish almost all of the roles that Salamence and Forretress have with remarkable efficiency. It's personal preference, really. The only bad thing about running a stall-based team in this metagame is the lack of good spinblockers, and that deters me from using full stall.
The only Therian that I've got a chance to test out is Landorus-T, and it honestly hasn't fared that well. I tried out a Substitute + Rock Polish set, and it was disappointing really. It didn't have much setup opportunity since it couldn't force anything out, and as a result it accomplished very little. I haven't lost faith in it though, since I think it has much greater potential than I'm currently giving it credit for. I used a simple max Attack and Speed spread with a Life Orb, but I think a bulkier spread would be better with less Speed and Leftovers along with Swords Dance to demolish opposing stall. Other sets that I have in mind are a 4 attacks LO set and a defensive set, and of course there's the obvious Choice Scarf set. I wouldn't use that over regular Landorus, however.
In any case, I'm really excited for this new metagame and look forward to watching it develop.