full clickable cockpits are a very interesting feature, because it do the keybinding easy and could be limited to most used keys/buttons in combat. Rest of the aircraft system could be used clicking with mouse or virtual gloves.
other interesting feature would be an automatic engine start routine and checklist, as second choice for the player.
By the way, we must remember, that in WW2, scramble aircrafts were usually started by the mechanics, and they also were keep engines warm, starting them time to time for a warm up.