Just a suggestion, not sure if feasible:
When a group of BF110s are attacked they should fly in a defensive circle to cover each other. Ive read about this tactic in multiple books and sounded very common early on. It would be cool to see AI doing it. More info here:
http://forum.1cpublishing.eu/showthread.php?t=15311
IL2 1946 had awesome AI and radio coms!