YES. These suggestions are definitely much-needed. Why is there a level requirement for handing in a quest I've already completed!? It's like "We need you to defeat these nearby monsters. Oh, you got them? Great, so here's your reward and -- WAIT A MINUTE!! You're not level 21!? Well, then I do not recognize your accomplishment, even though you did what I asked. I say good day to you, come back later."

If I'm not allowed to hand in the quest, then don't let me pick up the quest and complete it.

And yeah, like raelgun said, just more side quests in general would be appreciated, especially for leveling secondary classes or just having something to do while waiting for a dungeon queue.