Do very large warships necessarily need very large crews?
Short answerNo; automation can reduce complement, and achieving that on Type 83 could permit a larger class to be built and operated.
NotesType 83 is expected to be a much larger air-defense ship than Type 45, with an earlier estimate placing it around 14,000 tons. Its complement could still shrink through greater automation. Trained sailors are expensive and scarce, so personnel cost can constrain class size more sharply than steel or displacement. Reducing crew while preserving firepower could make nine or ten ships affordable to operate while supporting continuing work in British shipyards.