I hate to say it, but I found the older inserts in the rancor scene to be distracting. If I put in the GOUT, I can watch the entire scene and not find anything to be wrong with it, but seeing it in just a few shots made the quality difference from the surrounding '04 footage very obvious. Since they are so different from each other, I really think the scene should either be all GOUT or all '04, but not both. Since I usually don't mind the recomposites if they don't alter the actual content, I definitely lean towards all '04 for this scene.
In other parts of the movie the GOUT inserts stand out less. Brightening the throne room scenes does improve the lightsabers, but it also brings out video noise in the dark backgrounds and conflicts with non-saber shots in the same set, which go back to being dark again. Wouldn't it be better to isolate the sabers and just brighten them by themselves, so the rest of the image wouldn't be affected? I haven't got the faintest idea how to do that myself (lol), but it seems like that would be the way to go.
But despite a few such things, the colour correction of the '04 footage is generally fantastic, and I really liked seeing the high quality picture without the nasty blue cast and oversaturated reds everywhere.