I've done each of the two MSQ roulettes dozens of times, and the cutscenes are mostly unfun. Some of the fights add nothing and could be deleted, such as the one in Prae where there's no tank aggro for a little while, boss take's zero or insignificant damage until pipes start exploding, and it takes forever for you to regain your normal damage.

You learn little tricks as you go, esp. if you're tanking, but not much helps with the weight of cutscenes peppered with the occasional trolls. At an aggressive pace, Prae's been taking about 45 minutes, including approximately 29.5 minutes of solid cutscenes. Castrum at a good clip takes about 24 minutes, assuming you don't have to LFG all over again because both your healers or both your tanks insta-left (saw this happen at least twice).

For Prae, some of the worst trolling I've seen is malicious afk -- that is, people abusing the constant in-combat of the run to purposely afk very early on and force the honest players to low-man everything. Once there were two at a time doing this. There are very brief out-of-combat moments but you'd have to yell so that no one crosses the next purple line in order to votekick. Arguably with enough afk and low-manning this could equate to a cutscene's delay of game.