You can translate the same thing into hardcore content and giving the time needed to do the things....

Enrage timers could be entirely removed, but then be adding a bit more spice to complete content like savage and ultimates, meaning, you really need to be up for the task to get through it of course, so it comes down to if you got the skills more than being stuck on reaching some ilevel to able to just squeeses that 100 dps more in, it would open up the game much more and reduce the stupid idea about A teams vs B teams.