I constantly see this notion that perking the P51D, La7, and 190D9 will magically make all the chickenshits stop running. It won't. They'll move to the Tiffie. Perk the Tiffie and they'll move to (probably) the P-51B. Perk that and the 109-G10 would be the next to go. There will always be a 'fastest' plane. Eventually it would get to the point where the only unperked planes are the Spit I and 109E, and even then the Spit drivers would be squeaking about those chickenshits in the 109s that won't fight.
I know that to many the La7 is seen as some sort of Anti-Christ plane that magically transforms the pilot into a super-ace. It doesn't. Is the La-7 the refuge of choice for many mediocre pilots? Yes it is. Should it be perked because of that? No it shouldn't.
And as much as I squeak about getting gangbanged in the MA, I put myself in those situations. Why? I dunno, maybe I have an overinflated sense of my own skill as a pilot. But even in a plane like the 190A-5 (no speed demon by any stretch of the imagination) it is relatively easy to avoid La-7s and the like. I'm simply flying a bit higher than normal (moved from 10-12k to 15-18k) in areas where there are a significant amount of bad guys and a relative lack of friendlies. From there it is a matter of awareness. Now, the early early war planes are in a lot of trouble, because they are totally outclassed by everything in the MA. It would be nice to have a little area where only early-war planes could fly (a la Lazs). But even a mid-war plane like the 190A-5, or 109G-2, or P-47 (though it is tougher IMO) can survive and even thrive in our late war arena. Assuming your are cautious about what situations you put yourself in (which I'm usually not).