I mean kind of answered yourself right there. its not worth the exp. it probably wouldnt be anyway beyond the daily (which you would only get 4 of max anyway). its not going to take you all 4 days to get from 60-70, even with a cutscene-less MSQ.

Couple up with the fact that gunbreaker is a... tank? as in theres no queues anyway?

Dancer might have some awkward times without a friend and might be stuck in roulettes and HoH... but gunbreaker? you have the pick of the litter and plenty of viable and variety of options and dungeons without needing to resort to MSQ roulette.

honestly, if we're on the topic of useless roulettes, why dont we get up in arms over the guildhest roulette? those stop scaling after 50. they take like 5 minutes and STILL arent worth it! this is unacceptable.