Just curious, what position are the vanes in at rest or when say taxiing?
Are they self zeroing or just in a random position until X speed?
When is their position considered live/legit is it based on airspeed?
This might help with what would happen with a damaged or missing vane. It definitely seems like something that would be accounted for in the design or software, but maybe the addition of MCAS meant unexpected side effects.