The A321 is the most changeling one of the A320 Family. You have to be careful on the approach as it can only do one thing, decelerate or descend. Either way, if the previous posts are correct landing with autobrake low on runway with standing water wouldn't be my choice. I wonder what flap setting they were using...
Since this is a rumour network, I will do what it shouldn't be done on aircraft accident investigation which is jump into conclusions without a proper analysis of all the data. My bet goes to using the recommended procedure by the fleet for an approach on a normal day (no major weather) in order to save some fuel (low flap setting) and landing a little bit hot with also a low autobraking selection. The rest is history, but it raises the experience factor in order to have a good judgement on fleet recommended procedures.
Bets are on..
Check Six, Krueger