Lowry digitally scanned all the film right, and this is after LS monkeys color corrected it. how's about they actually did something partly right during this 'restoration'.
what if they went back to the original source stuff that had previously been restored, color corrected it and this includes the optical composite elements. only they then scrwed up and someone wasn't watching when they were doing the lightsaber rotoscope mattes.
it might explain why just the saber is screwed for color in some shots and the rest of the scene is fine. if they had color corrected a finished fully composited frame, then it would be logical to assume that other colors would be off as well. the fact that only the saber color is wrong in quite a few shots suggests that they did something else and this is why we might have to manually re-rotoscope the sabers or do a travelling selection to just alter the saber color.