LOC, RNAV, VNAV, VPATH, RNP 0.3, SAAR, approach construction, TERPS, PANSOPS, JAR, blah blah blah.
The NTSB was quick to release some snippets of information from the CVR, such as "sink rate" and "runway in sight" when the aircraft may have already been below the MDA.
I would be very interested in hearing the PNF (pilot not flying) call outs as the aircraft reached minimums at 1,200ft and the response of the captain.
We can speculate about the how and why this unfortunate accident occurred, but I would bet the farm the NTSB report of Probable Cause will read simply, as it did in the March 29, 2001 crash of the Gulfstream-III, N303GA at Aspen, CO:
PROBABLE CAUSE The National Transportation Safety Board determines that the probable cause of this accident was the flight crew's operation of the airplane below the minimum descent altitude without an appropriate visual reference for the runway.