The system just isn't built to entertain nor handle the legions of ADD-addled kiddies and grinder-monkeys that make up the modern AAA-title mmorpg audience.
If, worse case scenario, it just became one massive PK-fest wouldn't that be fun in it's own right? Struggling to build a character capable of surviving the constant attacks (that result in permadeath if you die).
It might even shake up the playerbase and let them evolve by seeing the benefits in working together (as death is now a real consequence).