I know AoTC and ROTS have a hard time restoring the film versions of their theatrical release…
Not ROTS. The only difference between the theatrical and DVD is a cut vs. a wipe. The DVD version was shown in HD so it is available, and the BD has the proper wipe, so a reconstruction would be very simple.
Huh. I thought there were some dialogue changes in RotS like there apparently was in AotC. My mistake.
In the Blu Rays, yes. But not the DVDs.