Overload as a mechanic was made to represent the bursty-nature of the Shaman class, yeah? 14 cards all come with the Overload text, yet there's only 1(!) with any synergy (Unbound Elemental). It feels like a severe imbalance. Take a look at the Combo mechanic of Rogues or the self-damage mechanic of Warriors or the healing Mechanics of Priest, and the reason they work is because of the excellent synergy they possess. Meanwhile, the singular advantage of being able to play these Overload cards super early doesn't work when you may not want to take advantage of them.
And then there's the Shaman card draw, which feels like it has 0 burst comparatively. You've got Mana Tide Totem (a cool card admittedly) or Far Sight. Those cards allow for 1-for-1 card draw a.k.a. sustained card draw. The other card draw/gain options are Silftfin Spiritwalker and Neptulon. Both would be cool for their Murlocs if Shaman wasn't already juggling Totems, Mechs, Dragons, and whatever else class of card (plus, again, zero Overload synergy out of those). To fix this, something akin to Solem Vigil, Arcane Intellect, Sprint, or Battle Rage would have to be introduced.
And another weird thing: Shamans are the Totem class, yet don't possess a way to summon more than 1 Totem at once, even among the standard hero power versions. If Paladins get Mustard, give Shamans Catchup.
Seems like you could fix all these little problems with a few tweaks. Such as: Maybe give Totems buff synergy when using Overload? Or reclassify all the Elemental cards in the game to work with Overload. Or make the act of unlocking your locked Mana Crystals give card draw (with Lava Shock or simply with another card). How about giving Neptulon the option to drop Totems? Make the 0-cost cards not crap? There's got to be ways to think outside the box, to propel the class into something more interesting.
For a while I thought the bros at Blizzard were slowly going down the Deathrattle/Reincarnate route with Shaman as a class. That is to say, one which relied on the act of killing/revitalizing its own minions to create combos, pull of tactics, and unlock abilities. That would've been a fairly unique niche for a class but pretty darn creative.
