I play USSR (SP), it's 1949 now. In 1946 allies DOWed me and we are fighting since. Right from the start, I've put 32 fighters on air superiority mission over English Channel. As a result, in a year almost all allied air forces are gone. It was expected, of course, AI always sucks with plains. For that reason I don't use plains against land or naval units myself, only on air superiority missions. I like land vs land, naval vs naval combat. But now, two years already, USA are building only planes. I've built a large fleet and now I'm gradually destroying USN fleet, but they don't care. They don't build any single ship, only planes. And all the planes they are building are immediately being destroyed over English Channel. IIRC in plain DD, having air forces almost destroyed, USA still was building many ships, making naval competition more challenging. Now it is quite boring.