Please return the ability to generate unassigned user upon deletion

The functionality when deleting a user used to be that the device and phone line (if any) re-appeared in Unassigned Users, ready to be set up from this menu. Now we have the option to delete the user and return to number inventory, which means we need to manually "purchase" the users from the Unassigned Users menu in order to maintain this workflow. I think another option other than "reassign to Number Inventory" would be nice - "Return to Unassigned" and the device/line/user would all be reset and return to unassigned.