Stop being delusional, the focus has shifted away from Orcs vs Humans. This is bloody obvious for the Horde at the moment, patch 5.2 and 5.3 should have hammered this home, the Alliance still has problems with being human centric yes, and this needs to change. The Horde storyline has taken the first steps on this path.
Just because the Warchief is not a Orc doesn't mean that they will not have a strong presence in the story, I can guarantee you that Orc NPC's will still be plenty active in expansions to come.
Hopefully we will have Goblins, Elves and Trolls right their alongside them.