I very strongly disagree that visual effects artifacts like matte lines or translucency need to be preserved. I might have thought so once but seeing how good the recomposited shots in the Blade Runner final cut looked made a convert out of me. A matte line is hardly an artistic choice - its an ugly side effect that effects artists had to live with. I'm a champion for the cause of an original Star Wars restoration, but I'm also realistic about it.

Blade Runner showed how you can revise and improve without harming the intentions of the source.

Still, interesting to see the various opinions on the subject.