How long does a quality restoration take anyway?
With a little over a year to go 'til EpVII, it doesn't leave much time for a restoration project, including all the research needed, planning, scanning, cleaning, recompositing (?), designing of packaging, filming/editing of bonus materials, having the sets manufactured etc etc. Seeing the OT again at cinema or on Blu-Ray before the ST would be fantastic but theres not too much time left for it to happen.... nobody wants a rushed release.