I always think that late war planes or any "later model" plane should be perked cheaply if it has an earlier war variant in the game.
La7.. perk it cheap, you have free la5. (la5 much more dangerous than la7 believe it or not).
F4u-C & F4u-4 perked, there's the -d and the -1
P38L : perk it cheaply when the -J is introduced
P-51D : cheap perk, there's the B model (which is even faster!)
P-47D25: perk it cheaply. There's the d-11 and the d-30 is a tad slower than the d25.
SpitIX: perk it cheaply. There's the V and seafire. (yah yah its a midwar plane, but its the latest variant of the spit we have)
205: perk it cheaply, there's 202 (well, if HT ever looks into the breda MG modeling.. dart gun gallore)
109g10 : perk it cheaply. There's f4, g2 and g6.
190d9 & ta152 : perk d9 cheap, 152 semi-cheap (about 10 perks). There's 3 earlier 190 variants.
Yak9U: perk it cheap, there's the 9t.
ad naseum.
perk it cheap = 8 perks MAX. C-hog its 8 perks, la7 about 6, 38L about 3, 51D about 3, 47d25 about 2 , spitIX about 2, 205 about 2, 109g10 about 6, 190d9 about 6, yak9u about 3.
And give 50 perks to each account at the start of each month IF said account has less than 100 perks. There would be no whining then about not having enuf perks.
Tumor: Were you here when the C-Hog was unperked? That was the only plane you saw for days on end. Everyone upping in the 4 cannon, quick turning, quick diving, loads of ammo ride because it killed with one snapshot, was THE only plane that could tear any ground target apart with 1 or 2 passes and was avaliable on CV. I was SURPRISED if I ever met a 109 or a any non-hog plane a WEEK. Its almost like now you see spits and la7's everywhere, but they cant kill with 1 ping from d800 (well, maybe spits can, but they need a to get a good burst in, they only have 2 cannons and not much ammo for them).