Isn't the 320 in direct law in the flare with regard to roll? No, not quite. Lateral control is side stick command to roll rate command in all landing phases to touchdown, same as rest of the flight. Roll normal law. Turn coordination continues. RA doesn't come into it.
In case of failure roll direct law gives side stick position to surface position relationship.
Of course when you kick off drift you will get a secondary roll effect, same as any aircraft.
All pretty academic. Cheers!