Here's the idea. When someone logs on, all late war planes are modestly perked. If they spend a certain period of time playing AH (or number of kills during that session or other criteria), they become unperked.
This way, everybody will have to use early war aircraft at least for a while, or use up some of their perk points. It works kinda like an RPG that starts anew every time one plays AH.
What do you guys think?