PvP games have notoriously been terrible, both in terms of net money gained by the company and over all player consensus.

PvP games are not popular with a subscription model, they're very complicated and prone to massive imbalances. It puts the entire game under a microscope.

MMORPG's are primarily a PvE game, with Final Fantasy being the up most pve oriented ones around. I would rather this game not be burdened by plague that is PvP in a PvE Genre.