Don’t forget the political situation at the time is totally screwed up to… Turkey did, in the end declare war, on Germany, Italy did too and declared war on Japan, Russia and Japan agreed not to attack each other till 1946, Japan recruited troops from Allied control India.
The map is indeed bigger - I think a good size, in fact. There is still along the top of the map a place to track IPCs which I think could have been done without.