Quote:
Retrying Levequests
Levequest targets give players many times more EXP and skill points than normal monsters (even if not using guardian aspect). To prevent some players from taking advantage of this system by completing most of a levequest, failing on purpose, and then trying the quest again immediately, we have made it impossible to retry a levequest immediately after failing it. However, this does not mean players are not allowed to retry levequests. By returning and talking to the NPC who issued the quest, players can gain the opportunity to retry the quest objectives.
That right there is SE saying they have taken enough measures to stop it being abused and are happy with what they left us. What more do you want them to say???