The Man In The Rubber Mask.
Today if a driver cannot be identified the owner (registered keeper) is ultimately liable. Why would you want to change this legislation if it would still work perfectly?
Today it is up to the owner to maintain the vehicle and to keep it in correct working condition. If a camera is muddy such that it misses a sign that is the responsibility of the vehicles keeper to clean it not the manufacturer (or insurer). If a camera is damaged or has failed it is the responsibility of the owner to fix or replace it as is the regulation today with tires.