I think, in general, there was a big lost opportunity to make Bladespire Fortress and Karabor the race hubs for the Mag'har and Lightforged, respectively. Both were originally intended to be the Draenor faction hubs for the Horde and Alliance, and a slight adjustment of story could have made them possible. The Lightforged Draenei could have been assimilated into Yrel's army of Light-fanatic Draenei, while the Orcs could have stood their ground in Draenor against the Draenei, making their final stand in one of Draenor's most remote and inhospitable environments.
Most importantly, both are hell of a lot cooler than both racial hubs. A building in Orgrimmar for the Mag'har is pretty pathetic, and the Vindicaar for Lightforged isn't particularly interesting either. Compared to the Dark Irons who get Shadowforge City, Highmountain getting Thunder Totem, Void Elves in Telogrus, Nightborne in Suramar - Bladespire and Karabor would have made for worthy equivalents.
Finally, it would have represented another reason for the Horde to gripe against the Alliance - the Alliance would be openly accepting of a people who waged a literal genocide against their own allies, something that would easily justify the burning of Teldrassil.