There's something about leaning over a computer on stage that I find boring...
If I could control the mouse with my midi controller's XY pad and buttons, I I be a happy man! (Not that I'm unhappy)
A simple learn function box could pop up when entering midi map mode, Which has four assignable parameters... "Mouse movement left and right", "Mouse movement up and down", Left Mouse Click", "Right Mouse click" So knobs, buttons, pad, wheels, whatever, any midi control can be set to the mouse...
This would surely create a better stage presence for a lot of Live operators.