Except, he cannot also. Hell, neither can Nazgrel.
I mean, honestly, the only thing I'm a bit more concerned about is how drastic, really, is the Mag'har and the current Orc Horde? Enough that they're culture can be reflected in their themes across the classes they can be? Their racials would be much different or would it be "Everything Orc is but Bloodrage?" These two things are the reasons Blizzard opted to not give Alliance their High Elves, why look the other way to Mud Hut Orcs?
Let's not forget they've been with the Horde for... How long now? And we're just now "recruiting" them? By this point we should just go to the Embassy and say, " Let's roll Mag'har now!" And get the achievement.
In terms of Draenor Orcs, there is enough of a cultural imbalance compared to the older Dark Portal Era Orcs of MU that can warrant Blizzard to consider them. That's probably why so many against AU get so damn pissy cause there is leverage no matter what they can try and dismiss.