Rogue has zero Mana tempo cards 

Hunter had dire mole. Right now lynx is quite weak. 

Druid does nothing the first couple of turns

Shaman, well they don't have a good one drop so they'll depend on good cards from the expansions. They're doing not too bad atm in my opinion.

But I have to disagree with you on your verdict that the one drops decide the game which is just a complete exageration.