a passenger is giving an interview on CNN at the moment
although it is a passengers comments, he does seem to back up some of the speculation here as well.
1)high on approach
2)rapid descent to try to get back into the slot
3)late realization that the rate of descent might be overcooked
4)application of thrust and harsh pitch change to arrest rate of descend
5)tail gets "hammered" (passengers words) into the ground
6)rearmost passengers are the worst off