lancs said " From the Lion Air thread, I believe MCAS cycles between the 2 AOAs between each flight..""..
If the system uses 1 &2 on alternate flights both are wired in, I would think it is relatively simple to put a 1-2 switch in the cockpit but it is only active when the red light / HUD shows there is a difference, that could possibly immediately allow crew to rectify problem
Oldoberon