I'm curious how you would know this.
I've been flying them for years on another sim.
By your suggestions, we should only add late war cannon monsters that probably were never fielded at combat strength.
I suppose that playing Aces High for more than a decade leads me to draw conclusions based upon previous additions I've witnessed. The P-40B we had, was a hanger queen. Poor performance, and relatively lower firepower were the causes. The MiG-3 was a seriously under-gunned, evil handling, high altitude fighter that the Soviets dropped early in the war. The Yak-7 is a dog relative to the late war arena. It may do well enough in the mid-war arena, but it's no improvement over the Yak-9T. Both would get a fair amount of use for a week or two, and then become a rare sight in the late-war arena. The C.202 is a better performer that either the MiG or the Yak at the altitudes we fly at, and it's basically a hanger queen.
The Yak-3 was very common on the east front from 1944 on.... The Pe-2 saw even more usage, and it's certainly not a "late war cannon monster". The Yak-3, while no better armed than the -9U, will offer better maneuverability and climb. The Pe-2, while lightly armed in terms of guns, can carry 1,600 kilos of bombs and would see a lot of use killing armor, ala the A-20G.