I feel like you get a little possessive about even the “neutral” elements of this game sometimes? Azshara? Gazlowe? The Cape of Stranglethorn in a hypothetical Anti-Cata expansion where the Gurubashi join the Horde. Also, if her goal is resource acquisition and tourism like she states to the Goblin PC, there are worse things than having the soul Horde aligned port in Stranglethorne if the Gurubashi really are going to fall in line behind the Horde.
If anything, its just as the “Can’t we just buy the Bilgewater” thread states. There is demand on the Horde that cannot be matched in such quantities on the Alliance. The Gnomes, Dwarves, and Humans combined covered most demand that the Goblins would normally profit off of. If ever the Trolls of Stranglethorn ever did follow the Zandalari and Darkspear, then holding a lions share on Horde imports and exports to and from the territory would be an incredible source of income.