i think the track listing reflects the fact that this game is geared more toward teaching new guitarists than satisfying existing guitarists. most of the songs listed are fairly basic, with simple melody lines or basic chords being repeated. there's not much challenge in that song listing for existing guitarists. certainly nothing along the lines of crazy train or a7x. and considering the wonky notation system they're using, i don't know if those songs would even translate into even a vaguely readable form on this game.
maybe they are saving the more difficult songs for dlc, but you'd think there'd be at least a few challenging songs on disk. it's ironic that this is the game that can be used with ANY guitar, thus should be more appealing to experienced guitarists who would want to use their own guitars instead of buying a new one, and yet the song list has almost nothing an experienced guitarist would be very interested in playing.