Stats stats stats - when Big Priest is up for discussion these do not matter...
Hell it could be a teir 4 wild deck I would still want the deck nuked from the game. I have done for years, it's the only deck I feel this way and I am not alone.
Why? Because gameplay matters and Big Priest not only negates minion battles, it outright punishes players for removing their minions. They are not a combo deck, with lots of stall, they still play minions - you are just not allowed to play your own and trade as normal. It fundamentally ruins hearthstone.
It's got to the point where nerfing Barnes would actually do almost nothing. That is how bad it's got. Turn 4 Vargoth...what do you do? Short of having them most premium transform removal in the game, you are fucked....because a 2/6 hit the board. It only ges worse from turn 4 onwards.
Mechanics matter boys.