I don't play jets much at all in BF2042 so my opinion isn't worth much.
I did quite a bit of piloting in BF1, 2,3,4 and 5
One thing I'd like to see is more options for manoeuvres, ie - air brakes, forced stalls, thrust vectoring, with g-force effects to balance this and to prevent dog fights becoming a constant circling affair. As in constantly circling as tight as possible will eventually make you pass out.
Another thing I'd like to see is more layers of cloud cover - as in cloud cover at different heights to make a cloudscape.
In the games I have played as a pilot once you get above the storm clouds it is pretty clear - so there is basically just a barrier of clouds you can't see within and then open sky above.
Whereas dogfighting amongst the clouds would be pretty fun.
