Much can be learned from the recovered debris, simply by comparing to other crashes both before and after, Ceritos DC9, CO DC9,Value jet DC9, TWA800, PA Lockerbie, French DC10 etc.) Some were low speed impacts into ground while others were highspeed steep nose down into ground. Some were loss of control, and some were internal explosions. Couple that with the available experience of known missile hits (mostly miltary) and a clearer point of cause (PRO and CON) can be had.
So why are we even speculating about an old report
if this comparison evidence was evaluated by compentent investigators.