When creating permission sets it would be great if, as a super user, there was a way to "mask" yourself with the set of permissions you plan to grant to an end user and test they work as expected before pushing them live. At the moment, we create permissions, ask the end user to test, make changes as required. This is quite frustrating for the end user, especially when they raise a ticket requesting a new permission, it is granted, only for them to then run in to further permission errors that hadn't been considered/tested.