I think I’ve come up with a pro tempore solution for ‘condensing’ parts: i.e. showing two parts in the score as one unison line for a bit.
I have a score with about 60 Flows, some of which are scored with 2 Violins, and some of which are scored with “Tutti Violins” on one line. I want the parts for both Violins to reflect that: i.e. Violin N part shows Vln N line in the divided Flows and the Tutti staff in the unison Flows.
I have created a third Violin Player, “Tutti Violins”. Each Part then contains Violin N and Tutti Violins. As a Flow contains only one Player at a time, there would be no double-staves. The score correctly labels Tutti Violins in the unison flows, and Violin N in the divided flows.
Again, this might be filed under: Obvious once you’ve though about it.