Downgrade Members Subscription to Free Membership Plan

Please consider making it possible for members to be automatically downgraded to a lower subscription plan.
Let us assume I created a Starter Plan which is free and unlimited and then create other paid plans, it should be possible for members whose paid subscription have expired to be downgraded to this starter plan.
They would still still have access to some few pages configured using the Shared Content. Downgrade to default Joomla access level as it presently is would not support this.