Sometimes the sabers are too bright, for sure, but the reason for that is because they were inserted from the GOUT, which has fairly severe clipping of the white levels, and so this somewhat blown-out appearance can't really be recovered to what it ought to be. Despite that, it definitely looks miles ahead of the rubbishy 2004 replacements.

As for the speeder shot, apparently that always looked kind of bad in the original (I saw a comment somewhere from one of the people who worked on that part of the film, saying that it could have been better if they'd had a few more days to get the composite right), but given the lack of quality sources available to work from, I think what Harmy was able to achieve with it is nothing short of astounding.