True enough. We DO see the Reliant main viewer as Khan stares out through it in TWOK, but there is no re-dressing of that part of the set from the Enterprise EXCEPT maybe the paint (the Reliant bridge had a lot more blue in it). The Grissom didn't have any viewscreen shots, and nor did the Saratoga that followed (which, while lit differently, was hardly re-dressed from Grissom at all).
Mark
Mark