I think part of the problem is the logical outcome here is to decimate the Horde. Burn Orgrimmar to the ground, put the Orcs back in camps, go full Scarlet Crusade on the Forsaken.
But that can't happen because it's an MMO and you can't just wipe half your playerbase off the map. So Blizz is left trying to give the Night Elves appreciable wins while at the same time not giving them revenge.