I'm sorry but "Lv.15" only tells me the quest is meant for level 15 players, not that the quest won't be able to be completed yet. I have a long history of playing MMORPGs, and I have always played by doing quests 2-3 levels above my player level, in order to to have some extra challenge while questing. This is the first time a game has such a strict limitation, except not on what content you can do, but what rewards you can obtain.

There is absolutely no indication whatsoever that the quest won't be able to be completed until level 15, except having read somewhere in a small, easy to ignore, tutorial screen that I probably didn't even bother reading, because, you know, no other mmorpg I have ever played does something that counter-intuitive.

If I can't do a quest, don't LET me do a quest, or at least give me a strong hint that it will happen.