[badsheep]

My Kodi is long to quit when I press command-q...
And I'd like a message to appear telling me that Kodi recevied the "quit" command, and is currently quitting.
Could be cool of course if that message would be optional and customizable.

[zjoasan]

I second this and would like to add:

A confirmation dialog on "Shutdown" and on "Reboot", and a notice that system us quit/reboot/shutdown.

[graham-h]

Supported.  Most devices have a confirmation dialogue which disappears immediately when you click Yes so at least you know something is happening.