well, I just started playing with the zuiho. Got into a match against two bogues, and my team consisted of two zuihos. The other player just retarded his way into 4 fighter groups. You can understand they didn't last long. I tried to bait them into fighting me over friendly AA, but they didn't bite.
So what do you do then? These matches are boring, and the off chance you do find a less competent bogue player is limited. Heck, even fighting against one bogue player is lame. It is also strange that the US gets better fighters. Granted they did have better planes further into the war, but in the beginning it was pretty difficult for them against the Japanese. Hence why I cannot understand why WG thought to give the Japanese a double penalty of less planes in a group and worse fighters as thinking it would be balanced against the US.
That said I wished there was more distinction between them. Have the Japanese fighters be more manoeuvrable, thus being able to prolong a 1 on 1 dogfight. Have them have less ammo, but more powerful. Make their speed slower. For the US fighters, I would give them better armor against AA, more ammo so they need less often to come back to re-arm, and faster speed to get to their destination. Also give your fighters a chance to retreat. Now if you commit to a dog fight, you can say goodbye to your planes if you see them losing.