Could you post some screenshots from the regraded scene with Rey handing Luke the saber? I need to end up marching that footage with the overcast colors from TFA and this sounds like something along those lines.
After the blanket yellow tint is removed from The Last Jedi, it doesn’t look overcast like it did when they shot the scene in The Force Awakens so its unlikely to help in terms of maintaining continuety. I’m pretty certain they reshot the scene again for The Last Jedi and the lighting conditions seem to have been pretty different.
Here’s a screencap comparison between the blu-ray and this regrade from that scene:
In my view this shot is also too blue. At least it’s not white balanced, so there’s a blue tint in the highlights for sure. If I regrade your regrade, I get what is in my opinion a much more balanced and appealing image, that keeps some of the warmth of the original color grading:
The colors are in very good agreement with this production photo, which appears to be shot with perfect white balance:
The colors of this production photo are also in perfect agreement with this amateur photo of Skellig Michael:
This production photo shows the color of Luke’s Jedi robes, which are in agreement with my regrade, and the other production photo, while the colors in your regrade are markedly different:
To summarize, I believe you overcorrected your TLJ regrade, and introduced a blanket blue tint across the film.
Here are all the example frames you showed, but with my color grading applied, where the fox image now looks perfectly balanced:
Here’s the LUT for those that would like to apply this color grading to the bluray: