Quote Originally Posted by Krotoan View Post
That's because all you're thinking about is personal benefit. The roulettes primarily exist to allow older content to be relevant and run. That is their purpose.
That would actually be a further reason to combine the two, as then those catching up on MSQ dungeons prior to the current patch would have far more players sourcing their matchmaking as compared to just the separate and relatively unrewarding 90 Roulette...