From videos seen, a lot of the victims seem to be burned, and others not burned, but suffering high impact injuries. In the videos I viewed, all victims are close to the main body of the plane. Unfortunately, (from a technical point of view) the view is too close up to decide direction or point of impact.
I can imagine they will try partial reconstruction of the plane parts, like they did from the Lokerby crash, and maybe suss the firing point of the missile given the known flight path, plus satellite/ drone footage.
Satellite & drone footage? Unlikely.