That lightsabre is straight from 97SE without any major tweaks and I really don't think the saturation is too high on either the sabre or the lights considering the saturation on the rest of the picture. The GOUT is very wrong in that regard IMO. I had a chance to see some pictures that confirm this. I did tweak Vader's sabre in some of those shots you suggested before though.

Anyway, I'm editing the duel together now (no I'm not that far yet, I still didn't get past the first ten minutes. I just needed a break from the beginning of the movie and decided to put together the scenes where I'll be swapping a lot of shots - such as the duel but also the hologram scenes and the prison block shoot-out) and I'm having some serious trouble keeping the colours consistent throughout the scene.