I think this is a bad idea. After waiting 45min to an hour to be linked with a party only to get kicked would really be irritating. Maybe something where you could vote on a rank-up / rank down and the duty finder would do it's best to link similar players together. I think that class/job discrimination would happen far to often if you let players kick a PC out of a duty. What I hate is when a character is running a dungeon just for gear and leaves a party in the middle of the run, I do wish I could rank a player down for doing something like that, but there is no point in kicking them if they have already left. I would just rather not play with that type of PC. But part of the fun is being surprised by the way people play, sometimes you mesh other times you want to tear your hair out.