Arena hero last year, Standard hero this year?

In KR communities, Bayfin Bodybuilder is suddenly famous for DKs, as a Armor DH silver bullet. DHs run less removals against this '7' health minion, so it is likely to stick on board more than a turn, denying deathrattle spams. (and also effective to other spams, like Dragon Warrior or Imbue Pally) We have little silence in the meta, and the only other choice is Royal Librarian; this murloc seems to be worth to consider.

What do you think?