If everyone can do it, and the end result means literally nothing.. why change it? You are basically saying someone has to invest more time in the game to compete in a statistical category that is irrelevant.
If it means that much, maybe have triple the points on kills, assists, etc if you are flying a 30ENY plane or higher. Kills per time and points is what wins you scoring in fighters. If I can up a sortie and get x amount of points in a la7, or xX3 in a p47, score wise, I'm takin the jug.
Would get some folks to bust out some hangar queens.
Your request is basically just asking people to fly more.