why not have it display other information that would be more relevant than the armor. As i suggested before it could display all the information about the planes weapons, including what ammo they used he and or ap, ect and what order they were placed in the ammo belts. It could also show the muzzle velocity and other relevant information such as the exact engine type that the in game play is modeled off of. This way their would be no question of the ammo that is used (no more does the hurr 2d or il2 use ap or he rounds) forum questions. It could also be used if and when they add a 109 version with a high alt engine, or any other planes that can have this option...
Also for me at least 1/4 of the fun is learning about these aircraft and vehicles, so any information that can be added would be extremely useful for most of us.