I would not consider inserting quick shots from TN1 for the sake of color.
I will not purely for the sake of color unless the color is unsalvagable in Harmy’s version and there is no other source. I have yet to come across a shot like this but who knows.
I will, however insert quick shots for the sake of quality and resolution, most notable during the battle of Yavin sequence where most of the space shots in TN1’s are very clean and where the jump in quality between blu Ray and gout upscales are most noticeable in Harmy’s imo. I will only do this if the shot has little to no noticeable damage on TN1’s and if the increased resolution and clarity is noticeable and improves the experience. And of course it will be color corrected to match.I would recommend some of the more noticeable shots than the battle. Most of those are honestly great, despite being GOUT upscales. I think what needs it the most would be the sand crawler coming over the dune, the exterior shot of the cantina, and the detention block extension.
The issue is that none of these shots mentioned (aside from the Deathstar battle) are pure GOUT by the time V2.5 rolled around. Most of them are rotoscoped GOUT mixed with BD footage or 35mm stills that are higher quality than TN1’s release (even if it’s from them to start with). I’ve actually been doing some tests combining the two sources (along with some extra cleanup), and putting TN1’s work in there sometimes stands out as reduced quality of the overall shot.
The best candidates for replacement are the ones that are still fully GOUT shots in Harmy’s 2.5, and there aren’t too many of those. Battle of Yavin, and a few shots in the hanger preparing for the battle (used to replace Biggs scene) are main ones.
Not sure what cantina shot you mean. The static shot of the dewback? The dewback itself does look much better when you substitute in TN1’s version. But the rest of the shot stands out as a bit lower quality. So unless someone wants to re-rotoscope these things, it will be a bit of a tradeoff. I think the following shot would be good to replace, since I’ve found the color on Harmy’s (which is also 100% a TN1 shot, so there shouldn’t be much quality tradeoff) to be unrecoverable: http://tinyurl.com/zd379md but maybe DarthLucas has had better luck. Other shots, too, but I’m sure it will be obvious what version to use once you line them up in your editing program.