Well, I haven't gotten over ilevel 300 and completed Drowned City of Skalla yet, so am not even sure what's included in expert roulette. I haven't unlocked anything since a few level 50 things that weren't part of the msq, so I'm going to assume expert roulette is mostly or at least partly picking from things people had to do to get thtrough the main story quest. Imo, that's casual stuff, so my opinion is the same.
At the end of the day not so good players will always be there. Some people are more bothered by them than others. I still think if someone is that bothered then they can do pf or play with friends.