Exactly, CP3S. The restoration of the film is not very complex, and is not hard to please people expecting this--a restoration of the film. Just...restore it. Make it look exactly like it looked and sounded in 1977. If something wasn't there in 1977--then it doesn't belong in the film. You take the negatives, you take the sound masters, you clean them of foreign dirt on the surface of the film and clean out scratches where there are any and bam--there's your restoration.
The "hard to please" crowd is created out of the fact that people want something more than this or less than this, they either accept or actually want things tampered with, to become inauthentic to how the film existed previously and originally--doesn't matter if the sound is different or has a new mix, wants a new mix, wants re-done special effects, wants no re-done effects elements but re-done composites, wants it all the same as 1977 except one or two extra elements, wants deleted scenes put in, wants it the way George Lucas says he wanted it, wants the grain removed, wants the colours altered, wants the image sharpened, wants all of these things, wants all of these things except for one, wants some of them but not all of them. Etc. It goes on. Then, when someone says "I just want the original, nothing more or less"--we're hard to please. No, it's very simple--just present the film as it was. If that does not satisfy you: you want a Star Wars that never existed, that you've just created in your mind as an idealised version of the film.
Anything which "improves" on the film, or changes any sound or picture beyond what was seen on either the final negative or the answer print in 1977--is not a restoration. Because you aren't actually restoring anything, as in putting the film back to its original state. This is what would be called an enhanced version. It is, to describe it another way, a Special Edition. This is not necessarily bad. I for one will likely never watch the pre-Final Cut versions of Blade Runner because that version is the best viewing experience. It's nice to have a version of the film that is not necessarily 100% authentic to its original release but has slight modifications in order to make the viewing experience more pleasing from a technical standpoint. But, aside from the fact that this is secondary in my mind to the actual original, this would not be a preservation or a restoration. If you want to talk about a tastefully enhanced version then fine, but let's call it that, because tp talk about it as a restoration or preservation is a gross misunderstanding of terminology.