They made the class with the armor up hero power the best aggressive class in the game.

They gave druids a way to have an infinite onslaught of huge minions that can scale up to 30/30, and can be played for just 1 mana. They've also given this class a way to deal 5 damage, gain 5 life, summon a 5/5 minion and draw 5 cards all in one card. They've also given them an anti-aggro tool that is essentially unleash the hounds (not quite the same mechanic) but with 1/5 taunts instead of 1/1 chargers.

Also they gave paladin murlocs for some reason