As an addendum, perhaps recompositing some of the effects shots digitally to clean up the matte lines, and get more clarity out of the model elements (compositing elements in 1979 produced some generational degredation whenever a layer was composited in to produce the effects).
I think that would go against the spirit of the DE. That project was treated as an act of film restoration; the goal was to make the new shots look the way they would've looked if they'd been done in 1979 using the techniques available at the time. So the CG was "downgraded" in certain ways -- animation elements were done 2-dimensionally at 12 fps, film grain from the authentic period stock was scanned and superimposed on the digital shots, etc. They were trying to preserve and replicate the imperfections of 1979 film technology, not erase them.