Role-less roulette seems like the pragmatic solution to this problem. First, it would have to be implemented in a way that the player can only choose either the lvling roulette or the role-less one for the day. Then the exp and rewards would have to be balanced to give pause to the choice, that way one roulette isn't necessarily overplayed than the other.

I'm aware PotD exists but it has reached its usefulness at lvl 60.