now we have several options for artwork syncing with devices, but none of them disables track reencoding only due to artwork handling. 'do not copy artwork' option and 2 'copy artwork...' options remove embedded artworks, and slow down syncing. 'embed artwork' option forces track reencoding if original artwork is not embedded (this slows down syncing also). i'd like to see new option: 'leave embedded artwork if present'.