Courageous and Glorious as 15-inch cruiser hunters

How useful would Courageous and Glorious have been in World War II if retained as gun-armed capital ships?

Their speed and fifteen-inch guns could have made them useful convoy escorts and cruiser hunters in the Mediterranean and South Atlantic, including against Admiral Graf Spee.

The ships could serve with convoys, Mediterranean forces, and South Atlantic cruiser-hunting groups. Against Admiral Graf Spee, a Courageous-class ship would add four fifteen-inch guns to the existing British cruiser force and radically alter the engagement. An unusual capital ship might still find a useful wartime niche when matched to a narrower task.