What this all began from was an unstable approach, pure and simple.
We have seen time and time again that if stable parameters are not met at the gates the operator/manufacturer sets then trouble is all too likely to ensue. And without prejudging the issue this event seems to have all the hallmarks of a mismanaged approach being continued instead of thrown away and getting further and further out of hand.
It won't take the NTSB long to figure what happened from the speed/rod/vertical profile we've all seen, the "why?" is going to be discussed for a long time.