Local Kentucky TV reporting 2 bodies found outside a/c and Coroner states from position of some bodies some pax prob realised what was happening.
Crash site looks very compact
My pure speculation:
Wheels off (no tire tracks other than 150yds did someone say?)
Insuff speed
touchdown & roll into trees or clipped tree
pause
fire/explosion
Be interesting to see if any emergency exits had been opened from inside If yes & fire main CoD then possible factor - remember Manchester UK 1985?
Engine fire on runway during t/o, door facing fire opened, fire spread through cabin causing all fatalities. Bigger plane and many survived.