Here's my list of notes on the second half. It includes all the problematic laser blasts, though I see now that you've already been working on those; but here's a thorough accounting of them. Again, nearly all of these things are just 2004 errors that haven't yet been fixed. And as before, anything I haven't commented on looks fantastic and excellent. ;)
00:58:19 — There seems to be some blue light leaking into this shot that isn't present in subsequent shots.
01:11:49:11 — Some pink/purple in this explosion.
01:14:02, 01:14:14 — The side of Han's face looks weird. Perhaps it is supposed to be that way, but to me it seems like an error caused by clipped reds.
01:22:49:01, 01:23:49:00 — Some definite purpleness going on here.
01:24:49 — Pink tint (or at least something strangely unnatural) in this shot.
Obi-wan's cloak appears too dark in nearly every shot of the duel; black instead of brown. Occasionally it is the proper colour.
01:26:24 — Some pretty extreme magenta going on here, both on the stormtrooper who gets blasted and in the background.
01:27:03 — The Millennium Falcon's engine glow diminishes somewhat near the end of the shot. I was under the impression that it remained constant throughout in the original version, and that changes in brightness were added in the SE. Is this a remnant of the SE effect, or is it supposed to do this?
01:28:25 - 01:28:26 — The TIE fighter that flies by in this shot is very green, which looks bizarre.
01:34:42 — Some blue haloing from the background lights can be seen on Tarkin and Vader.
01:37:58 — Frozen artefacts on Yavin. The ships flying away seem too dim.
01:39:00, 01:39:05 — Red Leader's helmet, normally yellow, appears green.
01:29:57:18 — This whole shot looks strange in a way that is nearly indescribable; particularly the laser blasts. There is a softness or blockiness or something I can't really identify, but it seems wrong in some way . . .
01:41:36, 01:41:39 — Green lasers somewhat desaturated.
01:42:28, 01:42:30 — Laser blasts almost completely white, particularly right at the end of the shot.
01:42:31 - 01:42:37, 01:42:52, 01:42:57 — Lasers seen through cockpit windows have no colour.
01:43:11, 01:43:17, 01:43:35 — Red interior lighting of Vader's TIE fighter is desaturated, particularly compared to wingman shot at 01:43:14.
01:43:21 — Dull and ugly looking laser blasts.
01:43:41 — Red Leader's helmet green again.
01:44:30:06 — Laser blasts in this shot look really repulsive. They have a hideous blue glow around them that absolutely should not be there. A similar problem also occurs later in the 2004 master, but I see that shot (01:46:42) has been replaced with its GOUT equivalent. Use of the GOUT may be the only option here as well, if this cannot be eliminated by other means.
01:44:32:20 — Now the lasers are back to being heavily desaturated again. Also at 01:44:35, but less obviously.
01:45:08 — Desaturated lasers as Vader fires at the X-wing; saturation on the subsequent explosion seems too extreme, though I won't presume to say if this is actually incorrect.
01:45:47 — Red Leader's green helmet syndrome makes a return appearance.
01:46:25:12 — This is an example of a laser blast looking nicer than at 01:42:30, which is especially odd since the two shots are duplicates of each other. It could still probably use a bit of a boost, though.
01:46:44:19 — Desaturated lasers also show up in this shot.
01:47:16, 01:47:31, 01:47:16 — Vader's cockpit lighting is dull. In the first shot it is also slightly pink.
01:48:16, 01:48:40 — Even duller and pinker shots of Vader.
01:48:41:11 — Lasers look kind of blue-tinted.
01:48:42:02 — Is the laser blast supposed to illuminate as it goes by, or is this a colour leakage of some kind? There's also some odd blueness to the right of frame just after this; again, I can't quite tell if this is a mistake or not, but it looks strange.
01:49:05 — Not only is Vader's lighting pink in this shot, it's so heavily desaturated there's barely any recognizable colour at all.
01:49:15 — Pink tint, both on Vader and his wingman. Significantly worse in the wingman shot.
01:49:25 — Underside of the Millennium Falcon too dark.
Seeing the colour change you made to the Alderaan explosion made me remember that the destruction of the Death Star in the 1997 version had some interestingly varied hues, reds and blues and such. Is any of that present in the Technicolor original? And if so, is there any way to incorporate it?