GGG blew their load with Affliction. Nothing will ever compete. It's the ultimate league mechanic, maximum difficulty for maximum loot. You could apply 99% damage reduction, 999% crit multi, and 999% extra action speed and people were still trying to cram in every monster they possibly could into the map. You can barely even consider Affliction an actual league mechanic, it was literally just cranking up all the numbers on the base game to a million. What new league mechanic could GGG possibly create that people might consider "good" again? Every attempt at creating something new has flopped.