Move User's Model Access into a separate boolean

It would be very helpful to have user role and user access to a model to be separately managed values. 

In some instances, we use ALM to move a big group of changes into our production model so we will remove access for non-admin users and reinstate them later.  Instead of changing each of our 700 users roles to "No Access" and later turning them back to the correct value our 8 roles, If I could just toggle a "model access" boolean it would greatly simplify things. No reimporting users, no scripts, no fiddling with roles.  Just On / Off.