I think the colour grade is an overall improvement, I’ve never been a fan of the technical side of Abrams’ films (colourgrade, too fast cameras, weird zooms, etc.).
There’s some that look off, Jakku looks too much like Tatooine when it’s more yellow than orange (orange, red, and yellow are the only ways of distinguishing between Tatooine, Geonosis, and Jakku), Starkiller base looks far too green (the exterior) for me personally and the naturalistic lighting on the last picture makes it look too much like England.
Overall it works on every other scene.
You make some good points. Although Jakku has always been Tattooine 2.0 for me (For better or for worse. Mostly worse). I never saw the difference between yellow and orange on Jakku and Tattooine. They both looked similar to me, with the difference being that one is less sandy than the other. The reds of Geonosis, however, those I see clearly.
Anyway, I think most of your criticisms can easily be resolved by increasing the reds and blues in the white levels of the image. I’ll make that adjustment now, and when I get a day off or two from my job, I’ll be happy to throw in some more screencaps.