- Ghosting. I'd say maybe 5-10 pixels to the right of a sharp edge, like the old guy, or Leia in the last pic, and at both edges. It's subtle, but it's there. Must be an artifact of de-ghosting (ironically)? I don't recall noticing this right away on your previous shots.
- Grain. This is tough, because the source is so grainy. Maybe C3D will help (as you suggest). That, or something else. But I think you're right to try.
- Colour. Yeah, I know you're not finished. The colour isn't so bad, but it seems like there should be more of it -- the saturation's a little low, in my opinion.
- Combing. The edges seem to be combed. Most noticable in the first shot (edge of the Tatooine blue halo). Don't know how or why, or how to fix it (short of cropping it off!).
I'm not trying to poop on your efforts; I know you like constructive criticism, and that's what I'm trying to provide. One of these days I'll get around to posting some of my own caps, at which point I will be wanting mucho feedback, too.