So I just watched this video clip and I see a lot of people complaining about Calia being in Orgrimmar and I can agree with the sentiment that she is not worthy to lead the Forsaken. No doubt she is a light abomination.
https://www.youtube.com/watch?v=2bgduIXYEVE
Solution: Calia should be thrown from the roof of Grommash Hold as she doesn't belong on the Horde and Valeera should be forced to take the Blood Oath and become a Horde member.
And finally we can rest easy knowing that Calia will no longer be alive to try to take the throne of the Forsaken and make her illegitimated claim in the Horde where she doesn't belong.