People really need to stop referring to #1-44 as the "New OU." This list is not indicative of "New OU." As it has been stated multiple times, "New OU" will take into account stats from May and June as well.
All you are managing to do is create further confusion.
Throw in the fact that these stats only include pokemon that were sent out in battle, and the picture gets even more grainy, as there are sure to be quite a few extra useages here and there, and weather starters are obviously going to be exaggerated by a system like that, while more situational pokemon will be shafted, because they may not have been needed to win.
Not to mention, the only side which
has to send out all 6 pokemon in a game is
the loser. So these stats are also not fully indicative of what's good. In some tight places, the real stats could cause some mons to move up, and others to move down a place or two.
To be honest, the only thing we can say has fallen to UU is Whimsicott, because it's that painfully obvious.
Also: @ Mario with Lasers:
OK, Gastrodon walls Rotom-W. What can it do back? Nothing. Gastrodon's attacking stats are rather poor, and Rotom-W resists, or is immune to, Gastrodon's STAB moves as well. In fact, it's Pain Split fodder for some sets. The only reason Gastrodon handles Rotom-W *better* than Quagsire is because the latter runs Unaware nowadays. And that's hardly a vote of confidence for Gastrodon if it's only being used because Quagsire has better things to be doing.
Hell, you could feign Unaware with Quagsire, and carry Water Absorb.
Besides Rotom-W, Vaporeon checks rain a million times better than Gastrodon. Ferrothorn too, and he can handle the support mons as well, and also beats Rotom-W rather easily anyway.
I fail to see why you should use Gastrodon, when there are, in my opinion, better options. Unless you literally want a catch-all for Rain. But even then, you could run Ferrothron, and benifit from a load more resistances, as well as things like Spikes, SR, Leech Seed and Thunder Wave, while carrying other teammates that can check what Ferrothorn dosen't.
And even as a catch-all for rain, what does Gastrodon do when Rain's support mons, such as Latios, come out?