Those planes SHOULD be perked. But for some reason they aren't. They out perform every other plane in at least 1 category, with the exception of the Spit16. I dont understand why the La-7, 190D, P51D and K4 aren't perked. I'm not asking Tempest -50 perks, just 5 or even less. Theyre top of the line performers yet aren't limited whatsoever.
K4- Speed/acceleration
La-7 - Speed/Acceleration
P51- Speed/Ords
190D- Speed/Acceleration
Tempest -Speed/Acceleration
F4U4 - Everything
F4U1C - Firepower
Spit14 - Climb rate (the highest besides 163 IIRC)
With the 410, it would have the firepower that makes it eligible to be perked.
By that logic the Bf110G-2 or Mosquito Mk VI should be perked for firepower right now. Do you see either of those needing to be perked or even set to 5 ENY? Seriously?
You can't just pull stats like that in isolation and use them to determine if it should be perked.
Also, climb and acceleration are pretty much the same thing, though top speed affects where you see that peak acceleration. If the Spitfire Mk XIV is the best climbing aircraft then it is also the best accelerating aircraft.