This $F and $U options are working only for name in vlc windows title, playlist names are still wrong. I tried also to correct tags myself with external programa but ended with only messing up my files because I was stubborn to keep using vlc.
This option should be present. Music files usually have correct metadata but why should I be bothered to properly tag hundreds of separate parts of my audiobook library? I tried some other players and found that foobar2000 is excellent alternative.