Incorrect stab trim?.
I operate 744, as well as out of Bagram. We ( not National btw ) use a Close-in Noise Abatement procedure. V2 ( to V2+10 ) until 3000' AGL. The pitch may be around 15-17 degrees ( as I recall ). We are usually light, as we have ( in the past ) carried more "in" than "out". With the reduction of force, maybe the load factors are shifting in the other direction ( no pun intended ).
Other than a load shift ( you don't need an aggressive pitch to shift rolling stock ), I am thinking an improperly set stabilizer. Weather looked good ( as per picture taken shortly afterwards in Cargo forum ) to me,and what was described by the witnesses seems to be "a classic" stall to me.
Incorrect stab trim setting, load shift, or some flt control malfunction.
Just another PPRUNE reader, saddened at the loss of fellow aviators, guessing and trying to make sense of a tragedy.