Any thoughts about Participants recording parts in PLS mode? That could save everyone some time, especially the director. Maybe not so much for you Musicals people but for us bands out here, it would be helpful. I imagine the Director session could suck those recordings in when the Participant next Joins. Tracks would be labelled with their name, date and time, as usual. Participants would need the means to delete unwanted ones - probably that have not been shared back by the Director.
Getting any/everyone to pay a Director subscription is way too much and they mostly don't want all those facilities but maybe a small fee.