"An A320 can stop in 800 mtr or so if required at MLW. just from memory".
So, can you tell us all just how many times you have actually practised this exercise in a real A320 at MLW and can you tell us exactly just how many thermal plugs were left in place at the end of each exercise?
Have you actually landed an A320 at MLW?
Or did you perhaps do it once in the sim or, even worse, perhaps read the statement in a book published in Toulouse?