To be fair, nobody actually knows the changes yet; we are just basing off text. Until a group gets in there and tests it (mainly the groups that have been dying at enrage timers or 1%), then we can make a fair assessment. This Ops has been so screwy anyways, and as anyone will agree, Kephess is the only thing that matters.
Not only is the damage nerfed, but the enrage timer as well. Seems like a significant nerf to me, obviously we will know when we see all the kill posts tonight. I say this because I'm also not sure I agree that Kephess is all that matters. Unfortunately we don't have a kill video, but I will say we hit enrage on Firebrand at 1%.