Meh, I still really dislike the idea. I can see one or two coming over, but any numbers actually warranting the introduction of a Zandalari subrace?
Trolls may be about strength, but there's also the fact that Zandalari are not remotely flexible. If they suddenly had Zul appear with his Golden Fleet and offer to serve Vol'jin that would be beyond contrived.
Forest trolls I can see. We have the Revantusk. Even the Farakki I'm not beyond believing might want to join. But Zandalari? I enjoyed their portrayal during Mists, I don't want that destroyed just because people want upright trolls. :/