What's the difference between the original Troll skin and the new one? I can't tell.
Also I think you should make other Troll models as well, like a Dark Troll Shadow Priest (possibly incorporating the half-holy half-shadow idea), an Ice Troll Barbarian (Ice Trolls are Forest, Jungle, and Desert Trolls that where exiled for being too bloodthirsty, who adapted to Northrend), an Amani Troll loremaster (Amani is a rare tribe of trolls which all the other Trolls came from) and/or a Desert Troll Wanderer.