Yes, I think that it would benefit from this, because the star wars trilogy has an fan base that is completely huge, and they will soak up anything that is put out about the star wars movies, especially these tweaks, that will be very interesting for them to sit and watch.
The Star Wars movies have never lost popularity since the first episode came out back in the late 70's. I am sure an expanded release that included every cut scene, blooper and discarded tune would be extremely popular with both the recent new fans and also the fans who waited in line at the theaters in 1977.
The Star Wars anthology would benefit from the release of all deleted and extra content that had ever been produced because there are a lot of die hard Star Wars fans who would go crazy over any extra content they can get their hands on. A lot of the hard work put into different Star Wars books and works has probably been left out so it would be nice to see that content.
The Star Wars anthology would benefit from an expanded release. The reason for this is it is simply more material for the Star Wars lovers out there. They would gush over it. Even casual fans might be interested in something like this. Anything that expands Star Wars is a positive.
Yes the Star Wars anthology will benefit from an expanded release including every single scrap of discarded tune and tweak, because people want all of the Star Wars that they can get their hands on. Star Wars is a legend to so many people, that they want all of the information and history that they can find. They will pay for it.