An other feature I would like to have is the electric flight seat. If you die in the game, you get hit by 230V until you are dead. No refly button, no points and... no life.
After all it's about realism isn't it?
No seriously: Realism is great, but after all it's still a game and the goal is to have fun. I don't think that many people would like to have to leave the server after beeing killed all the time.
If you really want realism, fly coop missions. In those you don't have a refly button.
But random failures could be interesting. If I don't loose my engine in 5 missions out of 10.