One thing I would like to see added would be a bugfix release option.
Our business model supplies bug fixes regardless of active subscription, if someone bought an extension from us we guarantee it to work and will fix bugs for free, our subscriptions merely cover new features. With that we have to manually send out fixes when we add them, it would be awesome if the item under a particular release could have a bugfix checkbox option which would allow access to the file regardless of active AMBRA group.
How I imagine it working is it would merely check if the user ever had an active subscription for that particular release (maybe verify against the release date and the range in which their subscription was active) it would allow the bugfix update. That way we could keep bugfixes constrained to particular releases.