Add a "second time only" option (For repeats, not Volta)
I believe this would be a great Idea an must be added in Muse-score. It would be a nice addition for solos, or soli. It would add a nice touch to your music without the hassle of having to expand your music and copy and paste the whole section again,just to change one part in the music.
Also it would be great to have an automatic chord generator, for making improvised solos in jazz, but that's far-fetched so it's just an Idea.