This same discussion has been through over and over again. Whil personally I would like more complex and/or challenging 4-man stuff, most of the players want it to be ez faceroll league. A lot of people already quit at the sight of good ol' Aurum Vale.

Personally I think of they made these complex/difficult dungeons, they could keep then outside the roulette. That way it would be perfectly optional to do them and no speedrunner could go nuts about having his day ruined by a bad roulette roll. Whether SE wants to dedicate any resources for this, I don't know. They'll probably keep on doing the same concept we've seen already as it keeps the majority of the playerbase happy.