Both boring and awful. We already have Bite and Feral Rage, Claw does exactly the same thing for the same mana cost and the same number of cards if you use it with your hero power. Just utterly, utterly redundant and lazy.
Can't wait for the 5-mana card Rend: 'Gain +5 Attack this turn and +5 Armour' in the next expansion.
Now, I don't know about you, but in my games I will see Druids spend an arm and a leg to never deal 3 damage when they cast Wrath. They are devoted to drawing that card off of Wrath.
As for whether this card sees play over Feral Rage, I think it's strictly better if Pirate Warrior is no longer meta. You won't need the 8 armor option as often and gaining 3 armor is well worth losing one damage. Bash saw plenty of play after all, and that was in a class that had 2 of Fiery War Axe.
It's also possible this card has been printed to replace Wrath entirely and allow druids to run Prince Keleseth.