I remember ages ago the FC thought it would be fun to run CT as a full party of only classes. Just for the sake of a laugh and the bewilderment of the alliance. I say let them play as they like. If it was a tank or healer constantly making the party wipe than there would be a more pertinent issue, but there aren't too many DPS checks in the regular dungeons that someone running a class couldn't manage, especially teamed with an item-sync'd dps. Maybe they just really don't like the thought of having such a splendid feather in their headband and would rather idolize the old boxer. Or they're RP'ing.