that is never a thing, the only time it happens is on weeks with stupidly bad affixes where groups want the 'best' specs in the game to make it a smooth a run as possible at higher key levels.
as to the OP, i love CoS, it is the first dungeon in a long time i could say i enjoy farming, i have over 500 clears in there alone over the course of the expansion on my main, it's a great place however the power gap in some of the perks is very real, if they were closer to each other in power it would be perfect but that aside i think it is a great template to take forward and use in future dungeons where it makes sense.