Thanks Joe.
Regrading that last screen grab, it looks good, but only shows a single frame, not actual motion or scene cuts. When heavily compressing video, smooth motion or clean cuts can be greatly compromised. I'm also assuming a variable bit rate was used for that recompression, which may have delivered a high rate with minimal compromise for that detailed scene, but may turn up the compression a lot for simpler scenes with people / faces in them, which in turn could result in greater artefacts.
I've watched some heavily compressed HD movies and while they are very impressive for their file size, they rarely match the original Blu Ray for consistent high quality on a big screen.