No visibility, tail first, banking hard to the right (or left) and tumble (with maybe GA power) might give you this debris field.
Yeah, maybe. But again, look at other tumbling accidents like the UAL DC10 in Iowa, it tumbled and flipped several times, and it still had some very distinct pieces of fuselage. Not to mention they hit the ground going well over 200kts!
It just seems that this aircraft must have hit with a considerable down angle to destroy the fuselage in such a complete manner.
Simply falling or settling onto the earth doesn't destroy aircraft parts as much as hitting with lots of energy.