Specially Defensive Ttar tears Volcarona a new one.
0 Atk Tyranitar Rock Blast (3 hits) vs. 248 HP / 156 Def Volcarona: 264-324 (138.2 - 169.6%) -- guaranteed OHKO
Ttar can even tank +1 Bug Buzz:
+1 252 SpA Life Orb Volcarona Bug Buzz vs. 252 HP / 252+ SpD Assault Vest Tyranitar in Sand: 101-120 (48.7 - 57.9%) -- 89.5% chance to 2HKO
It won't be 2HKO unboosted:
252 SpA Life Orb Volcarona Bug Buzz vs. 252 HP / 252+ SpD Assault Vest Tyranitar in Sand: 65-81 (31.4 - 39.1%) -- 97.4% chance to 3HKO
Granted, Ttar doesn't have the recovery to be a true wall, so it can be chipped down if it has to check Volc multiple times. But we're talking about a Pokemon that takes 50% to stealth rocks here (A move Ttar has). If an opponent has perfect hazard control against you, you're probably going to loose regardless. And if Volc doesn't have Bug Buzz, it can do nothing against Ttar.
This example feeds into the main reason why I don't think volc is broken, and frankly have a hard time taking your claim that it's meta-warping seriously. There are so many options that can potentially counter MOST Volc sets, that no one set Volcarona has is all that formidable. If you forgo substitute or safeguard you loose to the blobs, if you drop bug coverage you loose to Ttar, if you drop fire coverage you can't beat steels, if you drop giga drain then you can't beat grounds, drop psychic and SpD Mienshao (or Tentacruel) is an issue, and no recovery means no way to handle rocks or be tanky. You can only run 3 moves + quiver dance; any set will have several gaps. And it goes with out saying you have to provide Volc with a lot of dedicated support to reliably get it in the field in the first place. So while you are technically correct that there is no mon that is guaranteed to counter EVERY Volcarona set EVERY TIME, that is true for most great offensive pokemon. Exotic sets are a fact of life in comp, and with Volc you have to make trade-offs gaining the capability to get certain KO's in exchange for other important capabilities.
Base 120 outrage would be interesting but only if it was removed from Chomp, Dnite, (and possibly also Mence's) move-sets.
In my experience, I don't think Gallade as OP as some make it out to be. Although I don't play stall, and I respect the TC's decision as it really didn't have a true wall.