What if Japan sent the Kongos, the future emperor, and his tutor Togo to the Grand Fleet?
Short answerThey could form a powerful fast wing and give Jellicoe a highly respected commander plus an independent witness to the battlecruiser force's conduct.
NotesJellicoe might welcome Togo in Beatty's place if command arrangements allowed it. The future emperor's presence would create complications that the participating navies would have to manage. The Kongo-class ships might join the Battle Cruiser Fleet or combine with the Invincibles as a fast wing of the Grand Fleet. Four additional battlecruisers would add combat power. An independent senior observer would also change how the battle's decisions and reporting were later understood.