Another big problem with this idea is overgearing fights. Once you're overgeared, it becomes a lot more difficult to throttle your DPS down. A good example of this that I can think of is the Mog fights, both HM and EX... in HM if your tank/unaware DPS do too much damage to the King in the 2nd phase, he'll start his wipe move early. In EX, if you're doing too much damage, it becomes easier to accidentally off one of the little moogles prematurely.