The transition from operational boards to governance board is a common to growing organizations and it sounds like you are managing this very carefully, Lori! Good work. I thought I’d share a few articles that may be relevant to your experience.
Here’s a good article on board transitioning from a community land trust organization:
Another one from Charity Village:
And while this article does not examine the transition from operational to governance board, it does look at co-op growth and the need to remain alert to role clarification during times of expansion: