My typical leveling day: I want to level some jobs so I log in and do my daily roulettes, for variety, and then get back to spamming the highest level dungeon until I level or log off.
IMO, the leveling roulette is just being used once a day for the comparable exp and the variety. This just doesn't make sense when you think about its name and what it is meant to be used for. It is meant to get players back in to lower level dungeons to alleviate the stress of queue times. Plus, its name is "Leveling." Why not make this the clear path to take for players who want to level in dungeons?