(For Harmy) Did you see Joshua274's thread? This user's dad worked on the handling of the original film elements on all three films, and he has some interesting opinions on the various fan edits, including yours. Here's what he said about your despecialized edition:

Harmy

The whites on the Tantive IV no longer look as pink. However, they now look more yellow. Harmy commented about how the blacks look more crushed (sandcrawler scenes). If this is because they don’t pop out as much for the blu-ray release, my dad said that this was natural for a high-def format. What’s more if you’re only point of reference for blacks is an SD/analog release, then you don’t know what blacks are supposed to look like. What’s worse is that, in fixing the blacks, lighter elements now look more yellow.

Something else Harmy commented on was that the sand scenes just after the droids land looked artificial due to a clean up process for the blu-ray release. With the exception of the noise in the overall picture, my dad couldn’t figure out what looked artificial about it. However, Harmy’s tweaks make it look more washed out now.

Thinking back to your despecailized edition, I can see what his dad is talking about, specifically during the scene where Obi-Wan scares off the Sand People. That scene looked almost unnaturally yellow.

Here's the rest of the post if you want to see more of his thoughts: http://originaltrilogy.com/forum/topic.cfm/Opinions-of-fan-preservation-projects-from-an-individual-who-saw-the-original-film-elements/topic/17753/