Started at rank 5 and still am at rank 5. Here's some info:
I haven't been watching so I can't comment on misplays. I have seen a few that I can create logical conclusions.
Slaughters almost every Rogue it touches. Rogue's mid game is completely countered.
Loses to Murloc Paladin/Control Paladin very often.
Loses to Cubelock almost every time. Wins against Zoolock.
It's a real jump ball against secret mages. Literally an RNG game.
I don't think this deck will get you to rank 5. It'll get you to rank 10 at most and if it gets lucky. If you want to get to a high rank in the current meta, invest heavily in the Murloc Paladin deck by Ljac. I got to rank 4 with it and I'm going to reap the season rewards.