You can get done 2 ARF runs within the timeframe of finishing a non-skippable cutscene MSQ dungeons. MSQ roulette prior to 4.2 took like 15 or so mins to get done even with newbies and a lot of them just skipped the cutscenes anyway. Not everyone wants to sit through old cutscenes (which you will WATCH EVERYDAY I MIGHT ADD) you can just rewatch at a inn or on youtube.

As far as exp, I would get more or relatively the same exp from msq roulette doing Alliance Raid Roulette. As for tomes, farming via MSQ roulette is inefficient for the amount of time it will now take to finish them compared to just farming ARF x2 in the timeframe it would take to finish MSQ roulette now and you would get the same amount of tomes and with a run taking less time. If you don't mind rewatching the scene cutscenes over and over and over again everyday...fine. As for me, I value my time and won't touch msq roulette again and if i need to farm poetics I have other means to get them at a faster pace.