A reliable Mark 14 would improve rather than transform the early Pacific war

How much would an early fix to the Mark 14 torpedo's magnetic detonator have changed the Pacific War?

A better detonator would bring greater early submarine success, but not a complete transformation while the torpedo's other defects remained.

Removing one Mark 14 defect would have made American submarines more successful early in the Pacific War. More working torpedoes would mean more targets hit and a larger contribution from the submarine force. The counterfactual remains limited because the weapon retained other problems and no single correction erases them. Incremental reliability changes can shift operations over time without automatically deciding a campaign.