hgfed said:
There is over 800 pages here, so I don't know if someone has mentioned this. I kind of liked the new scene in the special edition where Sidious tells Vader that Luke is his son, but earlier Vader says something like "Skywalker must be with them" referring to the base on Hoth which is in contradiction to the later added dialogue because he wasn't supposed to know that Luke was his son yet. Maybe that's something to correct in your edit.
Another thing is that the added dialogue (when Sidious tells Vader about Luke) goes against the opening crawl that says Vader is scouring the galaxy looking for Skywalker, which means he knew Skywalker was his son.
I'd change the opening crawl and change Vaders line from "Skywalker is there, i can feel it" to "the rebels are there" or just remove it.
The opening Crawl of Empire says that Vader is obsessed with finding young Skywalker. It says nothing of the Emperor.
I always understood the fact that it was Vader who became obsessed with finding Skywalker. This is notably due the line in ANH during the Battle of Yavin when Vader says "The Force is strong with this one" when he's trying to shoot Luke down as Ben is talking with Skywalker. That fact alone would have driven Vader crazy if in fact all the Jedi were extinct by that time and Vader was "all that is left of their religion" according to Tarkin.
It follows that Vader would become obsessed with finding Skywalker. One: - because Vader failed to destroy him and thus the Death Star was kaboomed in what may have been a monumental failure heaped upon Vader by Emp (see the Robot Chicken episode for proof of this), and two - because Vader sensed a tremor in the Force from Luke.
We can natually assume that Vader learned who the pilot was that fired the torpedo that destroyed the space station. Vader probably recalled glimpsing or sensing Luke in the hangar bay right after he killed Obi-Wan and easily figured out that Luke accompanied Obi-Wan from Mos Eisley to the Death Star. That would account for Vader's obsession including sending the Imperial fleet to drive the Rebels from their hidden base. Whether by memory, deduction or mental odor from the Force, Vader had figured out who Luke actually was and became obsessed with finding him as the opening crawl attests.
Shadows of the Empire reveals that Palpy loved to make his servants squirm and fester against one another. That Vader sought to overthrow Palp is a driving force behind what we always felt Vader was up to, especially given the dialogue in the Core on Bespin.
I've always assumed Vader knew who Luke was from before the beginning of Empire. Palp, not so much. By the time Palp figured it out and gave Vader a ring on the Executor about his foresight of Luke destroying them - Vader plays along letting Emp think he's ahead of Vader on the subject of Luke and hands Emp the alternative possibility of turning Luke to the Dark Side that Vader had been contemplating all along. What Vader hoped to keep hidden from Palp was his own ambition to use Luke to overthrow Emp.
If anything the latest DVD dialogue from Empire about "the offspring of Anakin" destroys that symbiotic storyflow and totally kicks the premise of the movie off kilter from the Crawl.
The only additions of dialogue I would keep from the 2006 Release would be this:
Vader: What is thy bidding my master?
Emp: There is a great disturbance in the Force.
Vader: I have felt it.
Emp: We have a new enemy. The young rebel who destroyed the Death Star, Luke Skywalker.
Vader: Yes my master.
Emp: He could destroy us.
Vader: He is just a boy. Obi-Wan can no longer help him.
Emp: The Force is strong with him. The son of Skywalker must not become a Jedi.
Vader: If he could be turned, he could be a powerful ally.
Emp: Yes. Yes. He would be a great asset. Can it be done?
Vader: He will join us or die, master.
That would be all I would do with that scene if it were me beyond getting the Jedi Emp in the hologram to be in better continuity with the OT.