Yeah. Overload is pure crap and should be removed from the game. Or at the very least given the warlock treatment where discarding your hand, hitting yourself in the face, and destroying your own deck are actually roads to victory.
That said, shaman’s biggest problem right now is the lack of draw. 3-mana 0/3 taunt, draw 1 is a joke. Custodian is good but it forces the weapon archetype.