It just seems like common sense, I don't understand why it's not a feature. As I understand, there is currently no way to select multiple tracks using the Faderport 8. I can select tracks in my daw by shift clicking, and then the corresponding "select" buttons will illuminate.
Currently if you press "select", or if you press "shift+select", the functionality is identical. I just makes sense that "select" should select between single tracks, while pressing "shift+select" should select multiple tracks. No need for the current redundancy, and it's a feature most of us would love for our workflow.