S.F.L.Y
You are determined to squeeze every last drop from this favourite lemon aren't you.
Perhaps he intended to disconnect @ 600' but on realising there were other problems, decided against it & let the A/P fly whilst he tried to figure out what was happening.
Rightly or wrongly, he probably wished to fly the G/P , and indeed probably expected the engines or A/T to recover, thereby enabling him to do so whilst maintaining or regaining airspeed.
The lack of available thrust meant that the decision to remain on the glide resulted in a loss of speed. Whilst he may have (or not you seem to be assuming) been aware of this, the only remedy was to duck under the glide. It appears he didn't want to. The stick shaker prompted him to take control and in doing so he also disconnected the autopilot, which he may or may not have been too worried about being engaged, as it was probably doing what he wanted, maintaining the glide path.
As a previous poster stated, the feel of the controls on this aircraft would not make it possible to believe "you " were flying the aircraft whilst the A/P was still engaged.
Do you seriously think that his feel for the controls had suddenly downgraded to your level of comprehension of this whole 35sec scenario, and that he couldn't feel for himself that the A/P was still engaged ?
If the aircraft was following the flightpath desired by the crew, and there was insufficient thrust available to maintain the speed, do you accept that in the short time available perhaps they prioritised making the clear area , and accepted whatever speed above stall speed this gave them ?
I know you think that this was putting priorities in the wrong order, however " the proof of the cake is in the eating" and their priorities on that day seemed to have served them well.
Which part of your personality / character makes it impossible for you to realise that as a professional pilot body we seem to be broadly agreed that your fixation on two points here (the failure to fly best L/D & the delay in disconnecting, or according to you, failure to realise status of, the A/P ) is somewhat blinding you to the big picture.
You are an army of 1 here, that fact alone should be ringing some alarms bells somewhere in your head, where Oh where is YOUR situational awareness ? wedged between your buttocks I would hazard.
