While I dislike the system, too many big name MMO's have featured this so it's become a "must have" feature for many players. I just hope that it serves zero purpose beyond the Duty Finder. If my Free Company feels like a challenge one night, we ought to be able to attempt anything we'd like with any gear we've got. If iLevel is mandatory for every single instance, it's going to take a lot of fun out of the game for me and I'm betting quite a few others as well.