Right now in MusicBee the Tagging Tool is a powerful way to help keep your library organized. When it comes to lyrics, if you are saving your lyrics to the file it can show you which songs do not have saved lyrics. What I am requesting is the ability for it to tell you when the lyrics are too short. I figure 100 characters is plenty, though if people save their files with the "Instrumental" tag maybe less would be better, or maybe the option to filter out certain words.
Either way, I come across some tracks where there is data in the Lyrics section that is not lyrics. This would help you sort that and further keep things clean and organized.