The more I play this awesome game, the more I feel a jukebox mode would've been perfect. After all, this game has wonderful dreamscapes, not to mention the fact that the live performances are also very nice to watch. Imagine being in a party and leaving the TV on playing The Beatles with those awesome visuals. Not only it's great music, but it would be really fun to watch.
Also, the fact that it was taken out from RB2 at the last minute shows that it was almost done. So why not have it done for The Beatles?