@182flyer
You need to read the transcript properly. Approx 37 seconds after the Captain entered the cockpit the PF made pitch-down inputs. Apart from the aircraft speeding up and the stall warning re-sounding we know little about what happened next.
As others have said the stall warning coming back on may have led a confused crew into thinking they were making matters worse. It seems unbelievable that there is not a warning to warn the the plane is currently in a stall.
I wonder if there will be three recommendations out of this...
1) A warning that the plan has stalled and is falling
2) AOA indicator
3) A more robust (manual or automated) way of allowing the pilot to return to the previously good settings (attitude and power).