Neither of these would work unfortunately. The point of duty roulette is to make sure content that is not current is still being run for people catching up. If you removed it and baked rewards into choosing a low level dungeon, everyone would gravitate to the fastest one which completely negates the point of duty roulette in the first place. Dungeons like Tam Tara would have insanely long queue times because nobody ever wants to do them.
This is what will actually solve the problem.
