If we get rid of enrage timers every content in the game can be done with 2 tanks 6 healers or 6 tanks 2 healers (or even 1 tank 7 healers / 1 healers 7 tanks or even 8 tanks)

To simplify. DPS role will be useless to clear any content and endgame raid would be a lot easier to get a first clear and I mean A LOT.