Why favour an E-class 6-inch twin for a hypothetical three-Hood reconstruction?
Short answerBecause the mounting supplied the needed technical improvements and standardized Hood's armament with the light cruisers intended to work with her.
NotesIn the hypothetical three-Hood scheme, the E-class 6-inch twin supplied the improvements considered necessary to make the calibre work. It would also standardize the installation with those of the light cruisers intended to operate alongside the ships. The proposal rests on those technical improvements and common equipment within the force.