I guess the overload was necessary, because you add a 1-cost minion to your hand, that has the effect of a 2 cost one. Not really excited about this card, though Hagatha might get a good lackey package. We will see.
On the other hand the overload enhances Likkim, so aggro shaman might get some serious support.
Imagine getting the lackey that summons a 2 drop, then playing that lackey ends up summoning Millhouse Manastorm. The salt will be real. Still a very decent card but its another 1 drop that could potentially snowball.