What's with Regirock at #51? It's one of the best Moltres counters around(yes, I said counter, not check), acts as a great wall in general, and anyone who's used a sand team can attest to the fact that Curse Regirock is notoriously hard to kill. 
Torterra at 27 is also surprising... I thought that everyone knew how good it was lol.
Mesprit as the #3 lead is a huge jump, it's such a great lead :)
Spiritomb at #8 is weird. I mean, Rotom is probably the better spin Blocker. Is Alakazam really that scary? Well, yes it is, but w/e. 
Interesting to see Mismagius in the top 5 again.
On a side note - I got upper reqs yesterday... and this is the round that's suspect-free lol.
		
		
	 
Just to add to this, Houndoom made a pretty big jump, and Sceptile is climbing higher and higher. Toxicroak also made a jump as well, probably cause of the CroakDoom combo.
And Moltres was knocked down as the number 1 Fire-type in the tier to Arcanine, which is a bit more versatile. Moltres is way too one-dimensional if you ask me. Also Milotic is slowly closing the gap between itself and Venu, could it be number one soon? It's probably responsible for the drop in usage of Azumarill and Feraligatr. 
I don't get why Uxie is that high, it gets fucked over by so many things.
Hitmonlee also rose a bit, which I'm glad for because it was going to drop down to NU if it kept dropping. It's just sad that it's number one item is still Scarf.
Looking at the bottom of UU, I could never tell what might move up or drop down. If Exxegutor and Espeon keep this up they might move up. I know Eggy is pretty versatile but the only advantage I see of using Espeon instead of Zam is Baton Pass, and even though it's useful I didn't expect it to shoot up like that. Also why the fuck is Steelix that low, what's wrong with people?
But it's still a bit better off then Poliwrath, Slowking, Nidoking, and Regirock. Nidoking and Regirock have been steadily dropping so by September (next tier update, right?) they could probably drop.
And to respond to Erazor, I just have to say it's better late than never. Half a year ago Torterra and Mesprit were on the verge of NU, even after Yanmega was banned. It's about time people have finally seen the light. And I don't get how Mesprit can shoot up in leads that much and Uxie is still that high up there, probably cause there's a lot more battles going on with each passing month. 
And Spiritomb just has good utility. It can throw out status while checking all these hard hitting special attackers (yes I think Zam would be suspect if Spiritomb wasn't UU), and Fighters. 
I don't get what caused Mismagius to rise up so much, it's not like it was totally affected by Froslass or Raikou, but it's nice that it's up that high because it deserves to be.
Also still disappointed by Lopunny's usage. ;_;