Even before seeing Mike's screenshots, I was going to point out that the yellow in those desert shots needs to be significantly increased to approach the right look. I noticed the near-total desaturation of that scene in the 2004 master years ago, and it's bugged the heck out of me every time I've seen it. I have no idea whether adding that much yellow to the image will also allow for maintaining realistic skin tones, since the source is so messed up, or if there's even enough colour depth left in it to work with at all, but having an accurate reference is very helpful. The skin tones are already wrong to begin with, being way too much of a dark brown, so changing them is pretty much needed anyway, I think.

I'll make another point about the same scene, a difficulty that I'd anticipated in advance but waited to comment on until seeing it for sure in the workprint. The shots of R2 hiding from the sandpeople that are taken from the HD broadcast rather than the Bluray (since the Bluray has those ridiculous rocks shoved in front of him) have some sickly magenta highlights, most noticeable in the rock to the right of the frame. This sort of thing has been almost completely eliminated from the movie thanks to You_too's Photoshop wizardry on the Bluray footage, but these broadcast shots have not had the benefit of this refinement, and I highly recommend asking him to give them a go as well.

Completely agree with Mike's assessment of the blast doors line, by the way. Despite a few small mistakes, nearly everything about the stereo and 70mm tracks is spot-on perfect in terms of mixing choices, while the mono (while making a few legitimate improvements) is basically the 'SE' of the original audio tracks. The blast doors line ruins the scene and is a display of flawed revisionist judgement that foreshadows what would happen to the movie later on.