I think this aircraft needs a guarded switch,painted yellow/black,`Emergency Stab Trim, and a separate electric power supply to drive the manual trim wheels.. Lift the guard and it cuts out MCAS,and c/w switches,;move switch to NU/ND as appropriate;retrim,get speed under control,put flaps to lowest setting,go home......job done.....
The manual wheels can still be used ,and every pilot should be trained to fly the aircraft using manual trim across the envelope,as you can in most `spam-cans`....If you can`t ,you shouldn`t be there.......