I was thinking of attempting to do a merge request to the official MCE version, but FMGs comment that anything that changes the default behavior of the device is unlikely to be approved (and this does, it removes the keyboard fade out and just turns it off instead) sort of put me off from trying to figure out the process
for (( i=0; i<100; i++ )); do set-kbd-brigthness $i; sleep 0.01; done