"Changes that improve the continuity are all right, but this is, no offence intended, crazy."
Well here's the thing. The point of Master Edition is not to ONLY take care of continuity errors, but take care of little things that feel like you're driving on a smooth road and then suddenly hit a bump. An example of this is Boba Fett's death, which I think was a disappointment to everybody. It doesn't change to continuity of you change it, but it improves the character's image in front of the audience. The Han Solo line is a bit picky...very picky, but it's one of those things that, to me, feel like an un-necessarry bump on the road, and it's a bit...well...cringe-inducing