In trying to get some detail into the shadows I did end up overexposing the image a bit. I've toned that down and played with the colors some more. It's not quite as bright as I'd like it to be, but at least all of the highlight detail is preserved.
http://screenshotcomparison.com/comparison/58368/picture:0
Mid wipe there is an increase in shadow noise which is more apparent in my correction, which then quiets down after the wipe ends. The Death Star is brighter and more green, which is more accurate IMO.
@kk: There's a lot of yellow in the brightest highlights of your last clip, which is very apparent in that shot. I try for an even white for the brightest parts of a shot unless there's clear evidence to the contrary, so you may look into that.
@msycamore: The purple persists throughout the shot and into the next one, so the highlights of the TIE fighters and the Death Star are quite reddish blue.
Incidentally, something I noticed after watching this particular clip a million times was that the Death Star stops rotating before the end of the shot. I guess the special effects guys were just like "Eh, that's probably good enough".