mmm.. I'm sorry, but just his +0 ability makes him relevant. 2/2s with haste every turn is good. If you have two mana elves out to power him out turn 3, then you make a 2/2 if you don't have another mana dork or 2 drop. If you have a 2 drop to drop with his +1, even better. Next turn (turn 4) you could have upwards of 7-9 mana available (satyr hedonist potentially?) if they haven't killed any creatures. At the very least, 5-6 mana.
I think he's very relevant in a mid range/ramp deck. Even with a clear board, coming out and making hasty 2/2s every turn is very good. He's like a Huntmaster that is flipping every turn without having to cast anything. Plus, he starts ramping his +1 by himself if they don't deal with him or the tokens.
Since the other garruks are gonna rotate out by the time he's legal in standard, the one you want to look at is Garruk, caller of beasts. He helps you ramp up to that one on the following turn in my above scenario. That garruk lets you refill your hand immediately, after dumping it to ramp out stuff. It's a very nice curve, imo.