I don't know if this has been suggested yet or not, but one thing that would be good to see would be difficulty settings that you can customise like in the last game.
Because im not that experienced a flyer I like the arcade mode, but shooting down planes is far too easy as you only have to clip them from them to burst into flames.
I also seem to find it near impossible to get damaged by other planes or ground forces, so it feels like I am not properly witnessing the great damage engine
I don't mean to whine