The Vader line change by itself wasn't as bothersome as the undoing of a tightly edited sequence that follows, because George thought someone would be confused at to where Vader's shuttle was and where it would go.

James Earl Jones sounded like Vader had a bad cold. If it was even him recording the new line.

Count in the prequels and there must be a half hour or more of spaceships just taking off and landing again now. I'm surprised they didn't redo Captain Needa's shuttle ride to Vader's command ship. I thought he was going to the local 7-11 for some coffee! ;)