Engines found where?
Recorders sunk in mud ?
99,9995 pictures being witheld
Just to remind, the TWA800 engines were separated in uncontroled flight and yet were found in the debris field, so let's not be too conclusive from just a single picture out of 100,000
looking at both the engine picture and the one with the gear it dosesn't look like they have sunk very much into the sea floor.
Give a thought also to TWA800 and the thousands of pictures taken on the seafloor that you have never seen..
Photos are released as the invstigating body sees fit to keep the public informed. After the experts decode all the various bits of information both for and against theories they typically release critical bits of facts (photos and recordings) that the experts feel corroborate their findings. They are not in the business of feeding theories that may end up diverting their resources from the expert based task at hand.
be happy that you got something that at least shows where the investigation is at.