(I have flown A320 family and B737, but not the -800).
How does the cadet, going from flight school into a big modern jet cockpit learn crosswind technique? = by practising. On a crosswind or turbulent approach take the A/P out at 10 miles rather than at 1 mile so you can get into the groove of the conditions, and experience flying crabbed, so by the time you get to DA, you are well up to speed and in control. Then flare while pushing straight with the rudder.
This could be practised in the SIM, but in my experience it never is.