As more and more people are using Live for music proudction rather than live performance and they tend to sped most of their work time in Arrangement view and the piano roll, I think it's good to have an option to swap behaviour of Tab and Shift+Tab.
Currently Tab is for switching between Session View and Arrangement View and Shift+Tab is switching between Device view and Detali View.
Shift+Tab feels a bit awkward to press compard to other commands, because two keys are placed vertically and requires the pinky and ring finger.
Since custom keymapping feature would take long time to implement, having this features with next minor update would be helpful for some people who don't want to use 3rd party tools like AutoHotKey.