We are actually doing something very similar in one of the two next firmware builds coming soon. I've asked for a "level shift" type feature that would operate as if you switched profiles when a particular button is pressed. This would allow you to change sensitivity when in a vehicle, swap stick control between WASD and mouse for function wheels like in Grand Theft Auto V, or wherever else you'd like a situational setting change.

Ideally the feature would incorporate a press/toggle option so you can make it a change when the button is held or change until the button is pressed again. If you have some suggestions based on that concept, please feel free to post them.