All the changes annoy me intensely; I don’t think I could narrow it down to just one. But the one change that disappoints me most is the redub of Fett’s lines in ESB, as mentioned in a few posts a couple of pages back. This is arguably a relatively minor change, but Fett was always my favourite character due in no small part to Jason Wingreen’s superb, menacing delivery of his lines. Temuera Morrison’s redub sounded indifferent to my ears - almost bored. (I suspect he could have sounded fine, but the lines just seemed to have been rushed and recorded in one lousy take.)
Here is a comparison: https://www.youtube.com/watch?v=Y07PmuVgxj4
Bluto