I doubt if any change to the scoring system will change how I play.
Since I don't play for perk points, and I don't play for "score."
My main goal is to enjoy myself in a manner that pleases me. And I like to keep a decent K/D. I don't care about kills/time, kills per sortie, or someone elses score.
I just want to improve my hit percentage, and my K/D. That is what I enjoy doing.
I don't like to: drive vehicles, bomb hangars, pork fields, take bases, defend against hordes, fly in totally losing situations, help or hinder my sides chances of winning resets, or fly perk planes.
I think there are others who are like me that just want to fly planes, furball a bit and do other arcadish things that to we enjoy. I am sure I am in a minority here, but I am sure there are probably more than 10% of the players that are in my category.
And how we fly does have an over all impact on the arena. The solution to getting guys like me out of the MA would be to have a fighter town type of arena. That or force us to drive a vehicle, or a bomber, or something else that would bore us.
You perk my favorite ride? I find another favorite ride. You put up eny limitations? I fly other planes. You give points for defending? I'll still attack.
You want to take away perk points if I don't fly like you want me to? Well take them all, I don't use them. Maybe force me to use earlier planes? Well, I'll learn to use them effectively to fly how I want too

Some people just want to fly WWII fighters and have fun by whatever measurement they use to call fun.
So install these new rules, I'll still fly...
But I'll fly how I want to
