How quadruple 6-inch turrets could strengthen the Town class

What changes if the Southampton and Gloucester groups use the Edinburgh-style quadruple 6-inch turret?

They become more capable through a much greater volume of fire, especially if early production accelerates reliable quadruple-turret development.

The Edinburgh subclass was intended to carry four quadruple 6-inch turrets. The historical obstacle was turret readiness rather than rejection of the firepower concept, so the ships received triples and wartime construction continued with the available system. If development matured sooner, the larger arrangement could spread across earlier Town-class groups. Sixteen 6-inch guns would give those cruisers a much greater volume of fire without changing their basic tactical category.