What if the wider war began at Pearl Harbor?

What changes if stronger British and French deterrence delays the European war until Pearl Harbor?

Britain and France gain more time for rearmament and can deploy larger, better-equipped forces when the war finally begins.

More assertive deterrence would preserve forces for deployment against Japan and leave Britain and France further along in their rearmament. Even basic improvements such as wider radio issue in the French Army could make Germany's later position much harder.