Better handling of chord symbols
I'm new to MuseScore, but as far as I can see, chord symbols have to be linked to specific notes, even on a leadsheet template. This is not a good idea, because often on leadsheets, the melody note is held while chords change under it; thus some chords won't have melody notes to which they can be attached. Imagine, for example, a case where a sung note is held over a full 4 beats, but underneath a different chord is played on every beat. There are 4 chords, but only one note to "hang" them on.
It would perhaps be better to give the option to place a chord on any beat, rather than on any written note. Or perhaps to create a virtual chord staff onto which the rhythms of the chord changes can be written independently, without having to be "docked" to a note in the melody.