EWR:
Another thing:
Essentially the Captain has the controls during the finale phase of the approach (at least sometime before or after the airplane is fully configured for the approach), it is the F/O who is monitoring and verifying the equipment so a last minute change of control, like you mention, will not happen.
What you are currently doing was out dated with the autoland and is a hold over from the old Cat II days when the Captain took the airplane and had to disconnect the A/P to manual land after 100' RA.