Cofagrigus got a lot of usage at the beginning of the meta... well we'll see how it fares this round.
I'm going to back Oglemi on Jinx being pretty underwhelming. No for now really...
I saw maybe 1 or 2 Aggron in an entire round of play so, :/ Escavalier, Cobalion and Rhyperior do it better basically.
Blastoise is awesome.
edit: On the subject of Bulky Water types, Poliwrath should probably get an analysis (though it's not a MAJOR UU Poke, it's pretty good-- about the same level of usefulness as something like Scollipede). It's Circle Throw hits way harder than Blastoise's Dragon Tail, and makes is a real threat to many teams. It's resistances to Dark, Bug, Steel, Fire, Ice and Water Absorb give it great resistances in the meta, letting it switch in frequently and spam its STAB Phaze attack. It's an almost complete stop to Escavalier, Bisharp, Heracross, Cobalion, Snorlax, Houndoom, and further checks Arcanine, Victini, Mamoswine and fellow bulky water-types like Suicune. RestTalk + Circle Throw + Filler is the best set, but it can run a support set with Circle Throw, Toxic, + 2 attacks.