The THX LD is such a dodgy film print and video master to begin with, I'm not sure how much more there is to squeeze out of it. I'm not opposed to trying, but Coily is still going to be stuck in the frame for a good portion of the finale. I'm starting to think I need to sacrifice a goat for decent scope film print to turn up.
I think a preservation of all the 2001 CAV extras is a good idea. The CAV still galleries give my recorder a bit of trouble though. I have the other MGM LD editions with a couple things not on the Criterion.
I was at the Kubrick exhibit in L.A. on the next to last day before it closed. It was so crowded, I didn't watch the video installations in the 2001 section long enough to see if they had any BTS footage not seen elsewhere.