Only if ALL people are NOT new. Most of my Main Scenario roulette runs do not have a single person. Ironically enough, we kind of enjoyed some chat during the cutscenes.
But if a person is new, might as well not deprive them of the experience, if for those several moments. We can do some chatting, reviewing of patches, story talks, discords, FC chats, etc during the cutscenes.
Castrum Meridianum isn't a problem in terms of time spent. It's still less than 30 minutes on average with a good group (faster than the most of my average Skalla runs.) Praetorium can be too long for repeated plays though.