I think that's far, far too much value for a 3 mana drop. 4 or 5 seems reasonable to me, because drawing that many cards and then playing a big guy in the same turn is, in my opinion, probably too good.
Not sure though, that really stuck out to me as I played tonight. I like the meta of this game a lot because there's a lot of synergies between all the cards and classes, it seems like every round I play is unique. Just looking to get involved in the discussion. Cheers.