What gordo said....
The only way to go is up in the perk system. There are alot of late war "monsters" that will make the 51D,G10,La7,190D-9 etc etc look like piper cubs. Well, not that bad, but you get my point.
Instead of perking our current hot rods make new ones that are even more super.
ME262---Prolly the most expensive perk ride i can think of. 70 perks----temp now costs 25

F8F---Low alt furballers dream. Mid perk price. 40 perks
P-51<H><K> cant remember, just a cannon hauling mustang...your high alt nightmare and something to fight me262s in

40 perks
That bristish jet...cant remember the name
but it would be expensive. 70 perks
Temp----cheaper perk...25 points
Ta-152--cheap perk 15 points.
CHOG----cheapy 8 perks.
This is the direction the perk system needs to go imho.
The addition of these aircraft, which all had functuning SQs that were fully trained and deployed to combat before the wars end.
LaVa