Actually, you will find that the flight models of the aircraft in FC are by and large mostly realistic. it is only when you start to encroach upon the outer limits of those flight models that you start to see things that aren't quite kosher. Of course, you are right, the systems and avionics are far from realistic. However the point you should consider is that any FC pilot who knows anything will tell you that realistic avionics and systems will increase the lethality of those birds by orders of magnitude, and not make them less lethal, as is popular opinion. I only wish that I could use all of the systems in my Eagle, but alas, it is not meant to be, at least not for now.