As we all know, when an aircraft is partially stalled, generally from the wing root and extending outboard as the angle of attack increases, it exhibits increasing drag and decreasing lift which starts to become insufficient to support the aircraft mass, thus leading to an increasing ROD.
I always understood that at the stalling angle of attack the wing was generating MAXIMUM lift (or Coefficient of Lift more accurately, CL)! Beyond the stalling Angle of Attack CL starts decreasing. Throughout this drag is increasing.
Jet aircraft on the approach are usually speed unstable as approach speeds are less than minimum drag speed. Of course if you let the speed get really low full thrust won't accelerate the a/c since drag is greater than the thrust - you then have to lower the nose, decrease the angle of attack and get some speed back - this presupposes you have sufficient height to do so.
Not saying this is what happened on this accident but it could be a factor.