The ability to download a simple text file showing all of your Setup choices and parameters = display, audio,etc etc. It would be useful to both to the owner and any maintenance person. Even an app that was a type of "total inspector" of your settings - a mediainfo type tool that covers everything....
I would call it a "Backup & Restore" App for all settings. Asked for that many times in the past but never got honored. Still a good idea obviously.