I also don't think you have anything to worry about. The great thing about the 2004 dvds were that they were cleaned up, so that they have the same crisp image quality as new movies. That alone will help bridge them to the PT. And with ady's color correction, we will get even closer. Ady also said that he will keep most SE Cloud City windows. The wampa and the Vader shuttle sequence will go, but I don't think they neccessarily tie the movie closer to the PT.
In short: I think the final product will blow our minds away just like ANHR.