Yeah, the video telecine is really pink shifted, it looks awful sometimes.
I guess the 1997 IP would offer better results than the 1985 IP. But then to scan two different IPs, digitally edit them together, and also try to get the footage to match--its a lot of work. You might as well just scan the separation masters, which will look better. It's basically the same amount of work.
My feeling is that Lucasfilm will do the least amount of work possible (i.e. just scan one source and say here it is, i.e. the IP or a print), or they will go all out and go back to the negs. If they are going to start scanning multiple 35mm sources and editing them together it would probably be the same as if they had gone to the negs or the separations.