First you say it is lovely, then you say there is a problem. Make up your mind. You could be doing some fun things, but you do need to take advice. That is what this site is for. Handle it right and the people around here will listen to you. Keep up the way you are an no one will.
I have no idea what tools you are using or what color shift you keep talking about. And it isn’t shift so much as balance. The GOUT, and I think all the other pre-dvd editions, were done from interpositives. If you aren’t familiar with them, that is an orange tinted positive print from which an internegative (an orange tinted negative print) is made which is used to make the distribution prints. How well a telecine removed that orange tint varies a lot. We were used to those methods as most movies on TV and home video were that. But to find the true colors, you have to take it a step further than the GOUT or JSC. They are nearly as bad as the DVD/BR, but in a different way. All those garbage mattes and other flaws that you don’t see in the DVD/BR or the film scans (and we have three of those - old and faded, Technicolor, and a low fade print). So I would say we have a pretty good idea what the original colors were (on the prints seen in most theaters there would be some variation depending on the quality of the duplication). When Pleasantville came out with all its B&W sections, they went to a lot of effort to make sure that each copy of the film that went out had a similar bias in the colors on each reel. So even if what you remember was more yellow and if your memory is accurate, it may not be the correct colors coming off the negative. We have a lot of copies of the film that we can back track how they were done and come up with a very good guess of the colors. What you are coming up with does not look even remotely accurate and looks as bad in a different way from the blu-ray. You are shifting the colors too much when 90% of what you need it to fix the blanance. Turn the yellow/blue channel more to the yellow and the cyan/red channel more to the cyan. Stop messing with the tint. The most you should have to nudge that setting is 1-2%. And for select scenes only. The setting you are calling color shift is one that you have to be very careful with because the moment you go too far, the results look horrible. Other settings can be done with a heavier hand, but that one you must be light with or the results look terrible.