I like most suggestions, but add/ delete :
Make the Yak3 vulnerable to a believable level, it's not a flying tank, Its a plane plane comparable to the LA-7 in damage IRL, and it should be in AH.
Kill Buzzaw, or make it a separate tank arena map - compare online numbers when Buzzaw is running against other maps.
As someone suggested - remove range icon for the AAA vehicles used against planes, ie no computer aided gunsight in 1940's.
Remove F3 bombing, it's just stupid, unrealistic, and have nothing to do in a realistic arena.
Kill engine / start engine in-flight should be penalized with long restart-up time. It's a gaming-the-game situation we must get rid of.
Perks can be good to store if you want a month of perk plane flying for whatever reason. Personally I use my perks once or twice every year.