Inspired by this thread: https://community.ccleaner.com/topic/60322-windows-10-hklm-registry-keys-not-honoured-for-non-admin-users/?tab=comments#comment-328394
How about the ability to disable GUI buttons for features/tools that you don't want to be used? Or that you don't want your kids or other members of your family using easily.
eg. Preventing your kids from cleaning the registry or wiping a drive, just to see what it does.
It could be made something as simple as a right-click option to 'Disable/Enable this button/tool'.