I just hit a wall in Zul’Drak. Got 89/100 quests for the achievment “The Empire of Zul’Drak”. I figured out that I haven’t started the continuation for Drakuru questline in the ziggurat where we betray him. The whole territory is cleared out of quests. Before asking, I did the questline in Grizzly Hills, including the revelation in Drak’Tharon.