AFAIK all A320 that made deadstick landing after keeping engines at idle till 700RA were Microsoft powered. No IAE or CFM powered bus ever developed problems in this regard. Do you mind checking your friend's credentials and returning with explanation why would keeping engines at idle till two miles out be detrimental to anything except to FDM/FOQA
Stabilization criteria are all very well until they come in conflict with local noise and capacity regulations.