Watched the copy sent to me and the whole thing is marvelous! First of all it was really a joy to watch this movie with the isolated score, sadly forgotten in all Superman sequels (only the 1st movie got that extra feature).
Second, the LD scenes have incredible quality and I wasn’t expecting this sort of care with them and everything else. I haven’t seen other fan edits from movies, this is the first one, however I doubt there could be something better than this.
As for they not adding the original score (and finished special effects in the deleted scenes from tornado/missile), I remember reading about this in an interview:
http://www.jwfan.com/?p=4066