I don't know if many noticed, but the saucer separation shot in EaF was replaced with CGI:
The same shot is used again in BOBW Part 2, but it looks much better. Look at how far they've come with the same CGI shot just a few months later:
The deflector dish has much more detail, the edges appear smoother and not obvious CGI, the grain applied makes it look more real, and the lighting looks more realistic.
When I saw that quick shot in the trailer, I thought they had located the original shot, but after comparing the two, it's still the CGI shot. Very well done.
Yeah I noticed it was CGI in EaF but it does look a lot better in BOBW. It was far too dark in EaF and too clean looking like a lot of CGI in general, the gain really helps to match it to the model shots. It's a shame the incompetent HTV couldn't do something similar with the CGI shot from "Where Silence Has Lease"