1)my understanding is that flare law on A320 is a variation of normal law, pitch attitude at 50 feet is memorised and at 30 feet is reduced -2 degrees over 8 seconds to create an artificial feel. Other than above, I have never heard of entering flare law with gear down or alternate flare law and wonder whether they relate to a different type.
2) it is easy to confuse alpha-prot (an angle of attack protection) with alpha-floor (an auto thrust function not available below 100 feet)
3) In the simulator, I find setting, trimming and holding an accurate pitch attitude in direct law is quite tricky as there is no "feel" .It is not like a 737 and for those who suggest this scrape is due to lack of skill, a late change to direct law would make it very easy to over control during the flare.