Several of these revisions to the films might not be so bad if they didn't seem like such half-assed rush jobs. I'm talking more about the 2004 revisions. Hayden at the end of ROTJ mght be tolerable if they just took the time to do it correctly, and specifically shoot footage of Hayden for that purpose. Changing Boba Fett's voice is stupid because him being a clone of Jango Fett is stupid. It serves no purpose to any storyline, plot, or character development. How does making Boba a clone of Jango improve his character, or serve the plot of AOTC or ESB? It doesn't. It's a nonsensical alteration to the character that wasn't needed, and was likely just done because George thought for two seconds it might be "cool." I think it's creepy that's Jango's acting as father to a clone of himself.
I am in agreement about the Wampa additions. I might take out a shot or two of it somewhere, but all in all, I think it helps to see the physical size and primal nature of the creature. Seeing it chewing on the dead Taun Taun with blood dripping down its chin is an unsettling sight. Would've helped more if they could've gotten both Luke & the Wampa in the same frame. Something like a shot over Luke's shoulder showing how the Wampa dwarfs him. Easily done with a stand-in for Mark Hamill.
Now, I think this whole sequence in question would just be better with no dialogue at all. Vader just storms down the hallway, and they get on the shuttle and go. There's no need to have any dialogue there if George is gonna show us the shuttle's journey. Why does the Executor need to be alerted about his arrival BEFORE they even board the ship? Nothing they can really do until you're close enough to the SSD to begin docking procedures, anyway.
-NJM