I don't think we can trust the VFX in those shots since there's a person in the background and they're taller than the rim of the Enterprise saucer. Unless we are meant to believe that the Lexington is manned by a crew of giants.
The floating body is in the foreground, much closer to the virtual camera, just like the debris between "us" and the Enterprise. It is much clearer if one watches the scene in motion, not just a still here and there.


