The members of the group I play with routinely recycle nightmare sigils with drifting shade affixes.
Why?
Diablo is such a visual game that having an affix that leaves you running blind through half the battles spoils the fun and turns some fights into complete guesswork.
Drifting shade (DS) can be challenging to spot when it drops under the very similarly coloured domes that provide umbrellas for some elites. In that circumstance, it doesn’t matter what level of HDR your screen has, in the middle of a big fight DS can turn it into a complete lottery.
If the DS pools were a bit smaller and contrasted with the elite umbrellas it would be a massive improvement. As it is at the moment, DS can so dominate tactics that the quality of the rest of the dungeon becomes completely secondary and I can’t believe that was the intention for this affix?