Hitech, Vinkman's idea does have some merit, but to make it measurable would take some thought.
Why do I think his idea has merit? Simply, we would see more of the plane set put to use. There are many subscribers that consider the rank system a measure of there performance against other players. By changing the metrics a bit, we would certainly see more of the early/mid-war vehicles used on a frequent basis. Which, would reflect HTC's hard work modeling those vehicles.
respectfully,
ammo