I don't agree with the post above engine assessment.
Suffice it to say that the high quality photos available to the investigators would be enough for them to make a determination. The photos we are looking at do not have resolution to assess the blade condition
The TWA engines came off during the spin to the ground and thus would be no higher in RPM than a very low windmill (they fall flat).
My interest is the ten or so seconds of flight before the error codes were set and not at what the engines looked like when they hit the water.