I really wish people would stop looking at that, Demo has to do that on a Patchwerk fight because any movement whatsoever (which current raids are loaded with) absolutely crucifies Demonology, missing a Thal'kiels window can cost huge DPS cause that window aint opening again for another 15-20 seconds.
You saw the sims that were all over the forum just before the raids opened? How inaccurate were they? Want to wait a bit and see what live testing shows Frost at and have a lil bit of faith that just maybe they are for once doing something to address the tuning issues?