I absolutely love this lesson for multiple reasons. First, as you say in the instruction, these licks are incredibly useful to insert into almost any song. Second, I try to play all 10 licks as a warm-up prior to practicing other lessons; it really loosens up the fingers, and, for me at least, a very good way to work on your precision and timing. Finally, the backup/vamping tracks are extremely useful to use with other lessons. For example, I use them to constantly practice Cripple Creek and The Ballad of Jesse James.
I do have one request/suggestion. Your vamping tracks are 50, 80, and 100bpm. Is there any way that you can include a track at 70bpm? Sometimes I find 80 too fast and 50 or 60 on the slow side. Just a thought.