I agree that the BSA does not offer a wide variety of training for us scouts. Personally I have always wanted to take Basic Backpacking Awareness but have never been allowed.
I am going to be on my council Brownsea JLT staff this summer. This is just as good as a training, you learn a lot, maybe even more than attending the JLT as a trainee.
They do have trainings out their but they are extremely specific to a position such as Dean Chief, OA Appanach Chief, ect. We do not have anything like HAT or places to interact with scouts from other troops to exchange styles of leadership and meeting