Only Revantusk and Darkspear were intelligent enough to stop fucking around with legions of munchkins and took a side on which at least 50% of players don't have a reason to slaughter them all.
Most of those tribes are "lesser" tribes cast outside the walls of the empire and considered a nuisance to both the larger tribes and other races. Amani, Farraki, Gurubashi, and Zandalari tribes are all strong, despite the events of the Cataclysm and Vol'jins efforts. Drakkari Ice trolls are not gone. The magazine and Brann are full of crap when there are dozens and dozens of Drakkari Ice trolls in the Zandalari invasion force casting their annoying frostbolts. Either this was oversight on Blizzards part or intentionally done to show Brann's fallibility, either way if they were extinct they wouldn't be the most annoying mobs in the Zandalari invasion force.
---------- Post added 2012-10-31 at 08:00 AM ----------
Zandalari is still strong. They still got their own island that we have yet to discover
I am glad theya re running out of troll clans now, vanilla wow and every expansion has always rolled out troll 5 mans, zones or raid.
Sick of them as they all are up to the same thing (ressurecting/consuming some dead troll,loa, or god to bring back the glory days) it never ends well for them.