Is this really a restoration when special effects are enhanced with techniques like rotoscoping?
No, it’s an actual restoration.
I’m not sure if I understand your answer correctly but the website is full of examples where rotoscoping , cloning and other techniques are used for effects enhancement. That’s not restoration but manipulation
I think the website content is outdated. A lot of articles on the Legacy website reflect what he previously wanted to do, which was another special edition sort of thing. But the current Legacy is a restoration of the original Star Wars that utilizes multiple 35mm prints to obtain the highest quality picture.