If I have to pick something that’s bigger than stuff like the perspective on the cell block background or better mattes for the snow speeders I might choose either the Falcon taking off from docking bay 94 (maybe) or one or two shots of x-wings and TIE fighters over the Death Star. That’s it. The Flacon is charming to me for some reason. There is one dogfight shot (“I can’t SHAKE him!”) that is objectionably clunky in the original and so I’m OK with the replacement. The rest is crap and 22 years on are just as dated as the original FX with far less artistry.
I do wonder what I would think of the Cloud City windows if I didn’t know what they were doing. To me it doesn’t feel opened up like it was on purpose. It feels like the pushed it as far as they could and weren’t entirely successful.
But the whole “Vader travels to his Star Destroyer” is objectively terrible.