Ideally the preview environment and production environment are nearly identical and so that you can test how different configurations and settings will work. Eventually though, it's likely that some changes you made it preview no longer match production and discovering every change is difficult and time consuming.

It would be helpful to offer an opt-in feature where institutions can select a box in the Admin Console. Doing so will schedule a refresh of your preview environment to match your production environment. This would take place before each feature release (not monthly) and only if the user opts in.