Weeelllll, speaking as a Spit XIV fan I have to say I really like the FM in AH. The WB Spit XIV was a joke.
As to it being perked, yes, absolutely it must be perked. I think all perk planes, even the 262, are too expensive, but especially the prop fighters which only enjoy a slight edge over the top end free fighters. I also disagree with the "gangbang icons", but both of these are separate issues.
(Please, please put 3D cam covers on the Spit XIV, the 2D ones look silly and the cockpit view is wrong without the 3D cam covers)
About perk modifications on the last adjustment.
F4U-1C, was 8 perks, +2 perks to 10 perks
Ta152H-1, was 30 perks, -10 perks to 20 perks
F4U-4, was 60 perks, -10 perks to 50 perks
All others remained the same.