Why fitting British torpedoes transforms the TBD Devastator

Would a Devastator able to carry British torpedoes like a Swordfish change the assessment of American aircraft in Royal Navy service?

Only after a major redesign, because integrating the British torpedo system would alter the aircraft and the carrier infrastructure supporting it.

British torpedo carriage was not a simple hard-point substitution. The load path could force changes to the airframe, engine position, cockpit, and wing structure. The carrier's lifts, maintenance arrangements, and operating doctrine would then also need adjustment. The Barracuda and Avenger in parallel service show why different aircraft remained tied to different operational systems.