Hi,
Just to be pedantic, alpha Floor protection is an autothrust function which adds TOGA(full) power and locks the thrust at this when the angle of attack reaches a certain figure. It is not a flight control function. They would not have had this as the engines had failed! it is also not available below a certain rad alt height.
The flight control protections, alpha prot and alpha max may have been available( if still in normal law) This would have allowed the aircraft to sink at just above the stall speed (as in habsheim crash) but would not maintain a pitch angle at touchdown(splashdown) it would however maintain an angle of attack if the stick was held full aft.