@jdick, @mssavai, I’m curious where this went?
FYI see this other discussion where I’m proposing that we simplify the new cohort model a bit by allowing (and defaulting to) null start dates: More changes to the new Cohort Membership model
And I still support making either/both of the changes to the REST API I mentioned in this thread, but someone else would need to take the lead on this.