The reason for the crash as it looks now is they let the speed deteriorate to stick shaker and added go around power without trimming the aircraft proportional to the power increase. They let it go to max go around power without retrimming during the transition. A manually flown approach or go around would have allowed the pilot to feel the effect of the underslung engines pitching the nose up. That would have been what he needed to not let it go to go around power until he was trimmed properly. Automation works most of the time but not all of the time. I doubt it is tested to stickshaker and go around power because of the speed of the trim with the autothrottle going to max. A pilot can compensate for the out of trim position.