I've been reading this thread off and on since it started so forgive me if I've missed something but do we really need to see how Vader found out lukes name? I never had a problem with it happening off-screen, the ideas are good and I can see how Vader overhearing the radio could work quite well, but....
This seems to be straying into Lucas' prequel-style storytelling, answering questions that don't need answers, like how the droids became the property of captain antillies and how the emporers face came to look the way it did, these were just bad in ROTS and we didn't need to see them, and it's the kind of pointless storytelling I was hoping this edit was removing not adding.
No offence intended, I just don't see the point in this addition.