I’ve finally had a chance to watch the whole thing right through, and love all the changes that I’ve noticed so far (even the animated Ion Cannon I mentioned above looked good if a little confusing). The whole movie just seems to flow so much better now, and the effects are such that it could have been released this decade.
So many subtle changes - the underside of Cloud City speeding by overhead when Lando closes the Falcon hatch, the bottom part of the door raising in front of Artoo, putting a blaster in Han’s hand inside the “asteroid” (take that, Steven Spielberg).
The un-cropped cockpit shots look great. I don’t know how you managed that - did you splice in material from a restored negative?
I have seen people complaining about the blue tint being removed from Hoth (as if it were there originally!), but I really like that you slowly add it back as night falls when Luke and Han are out in it.
One of the biggest visual changes that stuck out for me was the adding of coloured lights to ships, particularly the large yellow lights on the Star Destroyers around the docking bays. When viewed from beneath the lights really make the ships, otherwise mostly just gray triangles from this angle, a lot more interesting.