I've been wondering why quests grant so little experience compared to just attacking bosses or players. I know that a number of quests have a certain chance of dropping legendary items, but it is still disheartening that they give so little experience while you are attempting to get one of those items.
Most quests award approximately the same amount of experience as they cost in energy, which is totally useless at the later levels, after bosses start giving 30 exp or more (Red dragon at level 50), where you get ten points of exp for 1 point of energy.
The drops from the quests are a good excuse, but it would still be a good idea, i think, to heighten the quest exp awarded by a great deal, so that they keep being interesting. Maybe increase the exp to such a point where it is worth it to mix quests with attacking bosses, instead of only attacking bosses?