This is going to be a three-in one wish.
1.) Have it possible to turn off the ammo counters.
2.) Have it possible to keep WEP on until your engine overheats instead of turning off by itself.
Why?
3.) Because this would factor into a realism perk multiplier. Stall limiter, auto take off, ammo counters, auto WEP, not being able to see your damaged list, disabling your GPS clipboard, no enemy icons, anything that helps you fly better than you normally would can contribute to a realism perk multiplier.
Each feature will contribute a 0.1 addition to a 1.0 multiplier, this multiplier will max out at 1.5. Each feature will have to be turned off before a sortie begins in order to contribute. For example you turn off stall limiter and auto take off, at the end of the sortie you initially gained 20 perks, well you turned off 2 factors so you now multiply the 20 perks by 1.2. You now got 24 perk points, 4 bonus perks for realism.
This will encourage players to fly more realistically and give the players a bonus for not using crutches to fly their planes.