Puggo - Jar Jar's Yoda said:
The whole scene with the emperor/Luke/Vader was very strong as it was BECAUSE Vader was silent. Just the way he was standing there looking at what was happening was extremely powerful - there was more expression in his silent sadness than by adding juvenile dialogue. George simply doesn't understand the less-is-more concept; he believes that more is always better. Notice that he has never removed anything from his movies, he always adds more and more doo-dads.
He removed Luke's wink! :-(
Apparently, it's ok for Ewoks to wink...