I am sharing a thought i'm having.
Perhaps some songs should be re-realeased for harmonies and keys. There are a few piano songs in LRB, and it has been done before with the Bon Jovi.
The songs for a possible re-realease pack would be-
1. Swing, Swing X
2. Every Little Thing She Does
3. The Final Countdown X
4. Crocodile Rock
5. Short and Sweet X
6. I Want You Back
X means Pro Guitar chart included
Edit: Changed WATC to Swing, Swing, because WATC was just re-released.