Well the WotG storyline hasn't even been completed yet. They're going to do like they did with Aht Urghan and not finish it for a while.
Yes, there may be no achievements. No, I can't get achievements for my 75 Dancer or Scholar. It makes me feel a bit shafted, but then I log on and Fire 3 some mobs and the feeling is quickly forgotten.
But who knows, maybe they might implement some things later on? Could happen.