The point of roulettes is to fill slots for people trying to clear specific duties.

If you aren't willing to play any duty in a roulette then don't queue for it at all. You get the bonus for being flexible when the duty selected by it is cleared.

Aurum Vale isn't even difficult. If issues are arising with people not being able to clear it then it's just an indication that parts of the player base need to start figuring out how to get better at the game. The people aggro'ing the entire first room are probably the same people that complained about the exp loss in Eureka they experienced because they were constantly dying from aggro there when trying to do things alone.