Anyone says that this sounds remotely fun or interesting would be the first ones crying on the forums when they die.
It would be endless whine threads about why should I stay dead because the tanks sucks or the healer sucks or the dps sucks.
Nevermind if they die to enrage timers, one shot mechanics or heck falling or drowning.
Quite frankly this would be an utter disaster.
P.s.
Would pvp be allowed because being ganked would be worse than it ever has been.