I suggest to take this game for what it is and do not demand more. All (or most) "bugs and features" were spotted, studied, and discussed ad nausea during the past two decades.
Let's manage our expectations. We can use all strengths of the game and mitigate its weaknesses using our creativity and experience.
When a simple X vs Y match is boring and easy, there is always a possibility to make a more complex scenario. If early Zero vs AI P-40 is predictable, what about the same Zero but vs A-20s escorted by the same P-40s. The number of variants is endless even in this old game.
And why not add a bit more human intelligence by taking the game online. There are a dozen or so servers running 24/7. Some of them offer interesting scenarios where one can choose to fight AI or human pilots or both. Humans are less predictable, aren't they?
Interception of bombers is one of my favorite tasks in multiplay. When the human enemy is there, I like it even more since I have to watch my six and plan my attacks carefully. As soon as I feel it is too easy and start to relax there is always that Mustang or Tempest pilot who is happy to saw the wing off my Bf 110.
Occasionally it's my turn to provide a wake-up call. Recently I crawled slow and low in my Hs 129 while the sky above was ruled by a good pilot in La-5FN who blew Bf 109s off the sky with ease and hunted our bombers. He got too relaxed at the end and tried to pick me up at my final approach.
Nein nein nein. Small Henschel is slow but agile and Mk 103 is deadly.
The more human factor, the more fun.