I forget where it was, but someone posted the audio, the pilot was 2 miles out and told ATC he had an engine failure. From the looks of the fire, it sure looks like he still had fuel on board.
The propeller also looks to me to be feathered. I wasn't aware that a full feathering capability was available with constant speed props installed on singe engine aircraft. Of course a feathered prop has much less drag than a windmilling or stationary prop at a flat pitch. But as you say, the pitch stop could have been damaged in the crash and the propeller pitch wound up looking like it was feathered. Or sumthin'.