It'd add a lot of depth if there were more types of damage your aircraft could sustain. Punctured/shattered cockpits, fires, partial engine failure, loss of nose cone, fuel leaks, system failures like flight assist, comms, radar, etc.
Currently when you get hit often times you just die, you don't get "wounded" a lot. And when you do it's just losing an engine or part of a wing, which is still fun and challenging, but having different unique types of damage and failures that you'd have to fight through that affects more than just maneuverability would be incredible.
I don't think it'd make the game any harder or easier (Hits that would kill would now be more likely to damage you in different ways), but it would add more layers, which is good. What do you think?