I'm not sure what the writers want to do with the Darkspear trolls anymore. They keep changing leaders. You had Master Gadrin, then Rokhan outta nowhere and now this Bwemba is here. At least we know they'll soon break out of this crisis since Vol'jin is -obviously- coming back from the dead. (They've been shoving down this fact down our throats since the Legion ALPHA.)
Ji is a criminally underdeveloped character which is why I stopped giving a fuck about him in the first place. His relevancy does not go beyond the Wandering Isle questline which is the same case for Aysa. They may as well be removed from the game, their presence dont matter shit.
Now if Chen was there... that would be interesting. He's the Champion of the Horde afterall. I imagine Baine would invite him for nicely brewed drinks for the feast.