How would 4,000-ton Tribals with four twin 5.25-inch turrets change the war?
Short answerThey would be exceptionally powerful destroyers and could devastate German surface forces at that level.
NotesThis much firepower, with enough displacement for the mountings to work properly, would overwhelm the German Navy's destroyer-level opposition. It is an example of how a modest-sounding increase in a destroyer's size can unlock a radically different armament and operational effect.