How badly would Germany have been outmatched if Britain had all planned Queen Elizabeth- and Revenge-class ships at Jutland?
Short answerVery badly, if all fourteen were present: the added 15-inch firepower could have made Jutland far more destructive for the High Seas Fleet.
NotesIf all fourteen planned British 15-inch battleships entered service in time and reached Jutland, their concentration would expose many German ships to gunfire beyond the punishment their designs were intended to absorb. Historically, only the Fifth Battle Squadron supplied this kind of fast heavy-gun reinforcement. Completion schedules and availability mattered more than paper orders.