I mean, do you think the solo duty quests as they are now were meant to serve as a measure of competency? To me, that's not really the case (nor has it ever been). In my opinion, the purpose of them was more to showcase a cool battle or further the story with gameplay integration, not test to see if you're ready for endgame.
Most solo duties are already facerolls anyway-- you could *literally* AFK through the entire Hien roleplay instance and win. Putting in an easy setting will not suddenly flood your EXDR with ice mages more than it already has.