If we wanted a 5/2 we could have just played Ice Rager for 1 mana less.
Seriously though. Quest druid will be better because of this. By quite a bit. Especially in wild where it was already pretty ok. It's a really fun deck so I'm actually quite happy with this card. (and I also play ice rager in that deck :p usually complete the quest by turn 7 on average)
Not terrible in Arena. It's sticky and competes with alot of 4 drops with its damage, If your opponent doesn't have a hero power that does damage, this always trades for 2 minions or 2 cards. It's honestly going to be a lot better than people think it is.