Re: Still driving?
it would radically open the interior to substantial design changes
<suppresses bad joke here>
if [joystick] centrally located the driver could sit on either side making cars region agnostic.
If it's a multifunction controller, I think you want to use your dominant hand. But it wouldn't be very difficult to position the joystick for optimal control, left or right of the driver, as desired.
although I believe Tesla uses induction motors
They do. Problem is, those need some current and a working power controller to work as a generator, which is how you use them for braking. The rotor might have some remanent magnetism, but that won't be doing much regarding braking if power is lost.