Special:UnconnectedPages contains many pages which cannot have Wikidata item per Wikidata:Notability and Wikidata:Notability/Exclusion criteria. This makes the maintenance of these pages very hard, because these false results are flooding every pages.
For example, on the Hungarian Wikipedia 758 of 1927 categories without Wikidata item are redicts (~40%).
Category redirect template's item could help us, furtheremore we should have a central place where we can add other exclusions (by title Articles_for_deletion/Log/ for example). Admins on Wikidata could help and cover a huge part of languages.