@dlvh: About the brighter lightsabers: Harmy did rotoscope in the sabers from the GOUT.

Here's a shot from the Senator screening and the same shot from the GOUT:

So while the GOUT lightsabers are a bit blown out and not perfectly true to the original, like Harmy says: They're still better than the SE.

It would take an insane amount of work if one were to recreate the true original lightsabers. And while negative1's team might have a source where the lightsabers look even better, I don't think Harmy or anyone would wanna spend more hundreds of hours to rotoscope them again, at least for now.