Could the Leander hull have served as a better basis for the Dido class?
Short answerYes. The Leander hull would be a much better foundation for the anti-aircraft cruiser.
NotesReusing an existing cruiser hull would avoid crowding the historical Dido design. The Leander hull would likely produce a much better Dido. Its greater beam, volume, and proven cruiser proportions offered a safer basis for the armament.