Not important essentially but it would be nice to have some kind of aircraft tracking system that managed stats for individual aircraft, assigned them a squadron code, serial number and kept track of their wear and tear. Then to have all of this reported to you so that, as you moved into a position of command, you'd have to manage your human and material resources.
Then, in the late war scenario you could have angry mechanics tying a knot in your relief tube because you've forgotten to rotate them and they've been working day and night for three days straight...