Considering no ones seen how the events of the final MoP patch play out, it's a bit too soon to say anything is unfair, when we don't know what will happen. Considering both factions will be taking Garrosh down, it's highly likely it will be a joint effort or just play out differently depending on what faction you play as. Similar to how Wrathion or whatever his name is, allies himself with either Horde or Alliance, depending on what faction your character is.