fox niner
The CVR transcript also has "RETARD, RETARD, RETARD" in it. This means that the thrust lever(s) were not idle, causing the autobrakes to disarm upon touchdown, and the spoilers to remain retracted.
RETARD is often heard on landing - it is a reminder to the pilot to retard the thrust levers.
The autobrake will not disarm upon touchdown. Read post no. 585 to understand the systems better.(page 30).
Furthermore, going under the GS makes perfect sense.
But it is not necessary, nor is it SOP, and the shallower approach can lead to floating. And perhaps asking a brand new PNF to inhibit the G/S warning at about 300' could be descibed as unwise?
TP