The present set up with Lyric is that you can store up to 3000 lyric tracks, after that you would delete one to add one. Do you already have 3000 tracks loaded? So far it seems end users have not capped out and gotten to the 3000 limit since most seem to use tracks with Lyric and them move. Completely get where you are coming from with your concern, but afraid that's the set up for now.
Will pass on your thoughts by moving this to Features & suggestions so it will be seen sooner by a representative.