I dont think it will see play. Warrior's current state doesnt need taunts to stay safe(He has lots of armor gain). Also Warrior has great win conditions like bombs, fatigue, mechs so buffing isnt enough to catch them.
Probably Warrior's quest will be like play x taunt minions. Let's wait other cards to see what will happen.
I'm excited for this in Wild, I'm sure we'll get a couple more Warrior taunt minions this expansion, and might be able to put the deck over the top with everything else there. But I agree for Standard right now: a little boring and underwhelming.
This card would be absolutely hilarious with Togwaggle's Scheme and Tak Nozwhisker. With an empty hand, you can add a ton of copies of this card, each of which buffs all remaining copies in your hand every turn (e.g. if you get 5 of them and play 1, the remaining 4 are 6/9 taunts by the start of the next turn; if it doesn't die and you play the second one, the remaining three are all 10/13s).
So when a class is dominating what Blizzard tends to do is introduce new cards that fit a completely different archetype from the existing dominant class paradigm.
That's... basically what this is. In a Taunt Warrior this is very good. Nice health total for it's cost, 4 attack is as reasonable as a defensive card needs it's attack to be, There's already lots of good taunts to play this with, Amani War Bear and Zilliax LOVE this card. There's Safeguard, Hecklebot and Applebaum, Tunnel Blaster's pretty decent. Proud Defender & Rabble Bouncer are pretty cool.
I think there's potential here. The loss of tempo is usually what messes up handbuff-style cards, and this is pretty good tempo so yeah.
Cards like this need to add to a bigger win condition and not be the win condition of the deck(because of 1/30). Depending the meta it might see a little play against the midrangy aggro decks. Can't wait to have fun annoying aggro players.