I don't think people care about the challenge or difficulty. When its their 500+ time running the dungeon, they just want to finish it and get what the went in for. When they do add more ways to cap Myth I see the iLVL cap as wasted resource as players in iLVL70+ gear will probably move on to that new content and WP and AK will be left mostly for the people who are just getting into it, and some (I know I would) welcome an iLVL70+ player to speed things up.