The Thalassian empire is strong and with all the destruction from the horde brought by garrosh. I'm sure vul'jin is busy keeping as much peace as possible to keep the survivors of the civil war in orgrimmar alive. you have to remember that there was only one reason to why quel'thalas fell and that was because of the treachery from Dar'Khan Drathir to break the rune magic imbued within the walls of quel'thalas impenetrable. Vul'jins horde has a mighty ally make no mistake. the thalassian empire itself is sovereign and stronger than ever.