When they took out the seasonal M+ affix Blizzard at least paid some lip service to the concept of the problems with cognitive and visual overload in the game.
But I suspect it was just lip service to hide that they just wanted to get out of having to design an affix every season. Because they immediately tried to add affixes that made the problem worse and seem to have no understanding that one of the largest contributors to this problem is spec designs that need an insane number of aura trackers to play efficiently. And adding to it is turning all the specs into a game fizzbin.