Balance is a necessity in this game (well, it is made a necessity by the playerbase).

As long as we have Extremes/Savages/Unreals/Ultimates with enrage timers, due to the nature of the three role pigeon-hole that we have, the difference between each DPS, each healer and each tank can't be that big. Take away the enrage timers, and they can drop the balance. And because balance is a necessity, we are forced to lose job identity.