So let's discuss what's OK and what's not OK to remove in a restoration.
(1) Gate weave: Digital stabilization improves the accuracy of most automatic dirt/dust removal algorithms.
I'd vote "YES, remove!" for everything except the crawl and credits, as people are more likely to notice text that's rocking back and forth.
(2) Brightness/contrast fluctuation: Locking the brightness/contrast of a shot to the brightness/contrast of the first frame in the shot tends to improve the accuracy and effectiveness of most dirt/dust removal algorithms.
I'd vote "YES, remove!", but only on a intra-shot basis. Inter-shot brightness/contrast fluctuation reduction is not very useful anyway.
(3) Non-dirt/dust anomalies (e.g., hairs): These are typically very difficult to remove. Also, some people (e.g., myself) have fond memories of certain instances of print damage, such as the "Tantive Orange Errors".
I'd vote "NO, keep!" for non-dirt/dust anomalies that are also present in a second source, such as the GOUT.
I couldn't come to a conclusion for the next two, so...
(4) Burned-in subtitles: If they're sufficiently different from the original 35mm theatrical subtitles, then something will have to be done.
(5) Alternate crawls/credits: ...