Panamax limits and aircraft-carrier design

How might larger Panama locks and all ten US fast battleships in 1942 have changed naval development?

Larger locks would mostly encourage larger ships, with the clearest design opportunity in better protected, larger British carrier air groups.

Larger Panama Canal locks would remove a major dimensional constraint and push the United States and other navies toward bigger carriers and battleships. Having all ten American fast battleships in 1942 might also encourage surface action, though naval aviation was already changing fleet priorities. Britain presents the more interesting design consequence because a modest tonnage increase could combine an Ark Royal-sized air group with Illustrious-style protection. Such a carrier could reach a practical peak in air-group size while remaining unusually survivable.