I would like to be able to spin the rotary knob in order to quickly move though large playlists. For example, while playing a really large playlist you might decide you want to skip ahead about 10 or 20 tracks. Currently, this requires pressing the right button many times which is very slow and tedious. It would be much quicker if you could spin the knob and for each click it would advance one track. This would be consistent with how you can currently use the knob to quickly browse through the playlist names in the menus.