I agree that some kind of PVP arena thing (not world PVP, that's one thing I will never forgive WoW for popularizing) would be a fun addition, but with the circumstances being as they are it would likely need to be saved for an expansion. Besides which, I've noticed Japanese-developed games focus much more on cooperation than competition, like Monster Hunter, and to get a good working PVP system takes experience and a sense of how competition works. I don't want to cast aspersions on the abilities of the dev team, but at the same time I want them to do what they're best at until the game gets back on its feet.