I also find there to be a gross lacking of quests... true, you have levemetes and guildhests, but I find the rewards to be very lacking, and almost not worth the time to do. FATEs are probably the most time-efficient, but FATE groups tend to get so large that often times by the time you get there, the mobs are already dead and you lose out on XP rewards. The fact that you have often to travel across the zone to reach a temporary FATE that you might not get any XP reward from also adds to this problem.