True. The versions released of Return of the Jedi, have the least issues, so the only remaining one is to restore the original scenes back in, which won't be a problem.
As mentioned in the other threads, we do have 4k sources, that will be downsampled to provide the basis of the restoration. There is already plenty of detail in the shots, as shown from our previews, screens, and short clips that are up.
Team Negative1