The lore for the troll druids was more than a little weak, in my opinion. They've had troll druids around, but they've just been hiding? Meh. To be honest I'm not really too concerned with the lore, but that quest stuck out as something that seemed to be shoehorned in to try to explain things.If troll druids were in hiding, they weren't doing it very well. It's not like we haven't been seeing trolls take animal forms since vanilla. At first it was mostly anthropomorphic forms, but the Drakkari had their share of bosses who could downright turn into animals, most notably Moorabi and Gal'darah. It doesn't seem to me as though they need any further justification, especially with the Darkspear returning to their Loa in this quest chain.I guess I'm assuming here that troll druids will lore-wise be no more connected to the Emerald Dream and "true druids" than troll priests are connected to the Light. Trolls having conventional Emerald Dream, Cenarion Circle type druids would indeed require more justification than is being given here.