Hi Mik74,
One disadvantage with using autothrust is that you will enter the flare either with the TLs closed (engines spooling down) or in the climb gate (engines spooling up to maintain VAPP) or something in between.
This Airbus document on cross wind landings is worth reading.
http://www.airbus.com/fileadmin/medi...LAND-SEQ05.pdf
Good luck.