I think a factor that is being overlooked is how the Tankers SA is so much better than what was historically possible. There's a huge difference between hitting a button and instantly moving from the commanders position to the gun sight, versus calling out an incoming plane to a gunner. Also think about how quick rounds get reloaded, or changed from AP to HE, these are modeled as working to perfection and minimal time. So while all the mechanical components may be modeled correctly, we have the advantage of better SA and virtually instantaneous control.
With that being said, I'm not sure anything should be changed, but I wanted to point out an aspect I had not seen brought up in this discussion.