I will give S_Matt some credibility on the Blade Runner issue. The reason being, "restoration" sometimes refers to the creative process and not the historic process. For instance, Orson Wells' Touch of Evil was restored in the 1990s to the version which he originally had envisioned, I believe reconstructed from his extensive notes on how the edit should follow; this was not a version the public ever saw, but it has historical significance for giving a glimpse at the original director's version of the film, same with Lawrence of Arabia in 1990 I think. One may argue in the case of Blade Runner that if Ridley Scott could have made Blade Runner exactly the way he wanted in 1982, it would be very near what the Final Cut is--S_Matt is not totally correct, of course, because it would never have been possible to do the visual effects like that even if he wished and also because the original colour timing was under his control and the new is an actual creative change. Of course, Scott had more control than he might like to admit--it was he who originally wanted the voice over and he could have cut the poor one finally recorded but was paranoid to do so because of all the poor test screening and pressure from the studio; ditto for the unicorn and happy ending. While he was being pressured to include these things and of course he realized how studio politics work, as far as I know he ultimately did conceed to them voluntarily, as he also did on his next film Legend for the same reasons, so the film was never wrenched away totally, even if he later regretted this, hence the issue is a bit more complicated than simply saying Final Cut is how Scott wanted to make it.
But ANYWAY....
This has nothing to do with Star Wars. Forget about Blade Runner. In a worst case scenario, Scott is engaging in simply changing his original choices (colour timing) and enhancing effects no matter how tastefully beyond the capabilities of 1982 (recomposites). In a best case scenario, and this is the one S_Matt is arguing, he is restoring a vision of his that was taken away and/or never allowed to be fully realized. Fine. That's not what the preservation of Star Wars is about. Like Final Cut, we have the Special Edition, in which Lucas has mainly changed his original choices but also artistically restored some things which he would have liked to do but never was able to (sorta. maybe).
The preservation of Star Wars is a historical one. Blade Runner has its historical preservation as well--the 1982 theatrical cut is presented from its original interpositive in a 4K scan, cleaned of dirt and scratches and presented in high definition. Ditto the International Cut of home video fame and the 1992 Director's Cut which launched the film to the status of classic. And for the hell of it they threw in a Workprint which was screened a handful of times, sourced from the original 70mm reels from which it was shown. So, restoring Star Wars would be on similar lines--none of this recomposited stuff, in Blade Runner they call that The Final Cut, not the restored "Archival Versions" (the term BR gave to its historical restorations of the previous versions).
The Final Cut of Blade Runner is not a historical preservation, it's an artistic one if anything, and even then that's a slightly flimsy concept. The preservation of Star Wars is of a historical nature. Either the film is precisely as it was in 1977 without foreign blemishes (dirt, scratches) or it's not a true restoration--just like they did with Blade Runner, and I'm not referring to the Final Cut but the restored archival versions. You can have a "halfway restoration" which includes some enhancements and inauthenticies, like Adywan's ESB Reconstruction and what S_Matt is proposing. But another word for halfway is halfassed. I'm not interested in anything halfassed. But if it comes from Lucasfilm this is probably what we'll get.
*(Not to knock Adywan--his ESB Reconstruction isn't halfassed, he simply didn't have the materials to make it totally complete, because he is working from the unrestored older versions. So it's a circular problem--the films aren't restored and because they aren't restored fans don't have the materials to do it themselves).