On the A320 one can cont' with the ECAM action until one reaches 400'AGL on final.(QRH preamble)Most firms 'cut off' cont' actions at 1000 agl to comply with the Cat2/3 limitations.
On the 727 one could get away with 'not doing too much'until on the ground-with a single loss.The loss of 2 engines by the FAF required one to select MCT,bug up 30kias,select Flaps 5 and call for the Standby Rudder pwr-otherwise one didn't reach the field.
So develope where you'd like to 'leave things alone'on final until landed(don't forget to call for the equipement)
Cheers
