But just as the new "stall" hype dies down so too will the "novelties" you mentioned. Inevitably most people will stick with what gets the job done - which tends to be the some of the best pokes around. The absence of salamence is not creating a new metagame, I think. What you're enjoying is some breathing room to experiment?...I must say, I understand why people disagree about Mence being moved up into Ubers, but remember something: It's not only about if he's too good for OU. It's about creating the fairest, best possible metagame for people to enjoy.
Now, some people are citing that there's a load of stall on the ladders -- this is absolutely true, but chances are that this is old stall players coming out of the woodwork to take advantage of people who aren't as in practice facing stall (since MEnce made stall that much less popular to play and harder to play for those who aren't top tier stall players like IPL), and I would bet in a few days or weeks it'll die down quite a bit. This meta is surprisingly balanced and fun for me. I get to experiment with a lot of new novelties, sets, and team combos I would have though impossible in the "Mence" meta: RestTalk Gyarados on a mainly offense team? Fucker's IMPOSSIBLE to take down with screens.
Oh. And Shaymin.
Not sure. Either way, I hope Salamence remains OU!