It doesn't matter if this card is OP or not. The simple fact that is the same mana cost as reincarnate with better effect and no drawback is inconceivable.
Wrong. Reincarnate can work with any minion as:
-giving divine shield back
-removing bad buffs
-knife jungler activator
-giving second charge.... etc..
This one work only on minions with deathrattle and don't do anything from above. Maybe even worse card than Reincarnate.