I agree that just adding the system to choose a class to enter as wouldn't be enough, but a Role Roulette would probably make it worth it, and that Roulette would give an additional bonus for going. Like for example it becomes a checkmark on Levelling Roulette and you get a bonus of tomes AND XP no matter what class and dungeon is chosen (even if it's not a level-cap class, which is the usual requirement) OR by doing Role Roulette, you'd get an experience reward on all similar unlocked classes (so say I queue in and I get in as my Level 60 WHM for say a trial roulette. Because I still need to level SCH and AST, I'd get a token amount of XP for those roles as well.) Probably wouldn't be so simple to implement and balance, but something like that would be awesome... I hate having to choose between advancing end game and levelling, particularly with the Relic steps... I'd much prefer to being able to level up an alt class while also progressing with end game stuff - even if they do it at a reduced rate from using your main class.