I didn't like BnZing an F4F in my Bf109E only to have a Tempest Mk V come screaming up my bellybutton from lower altitude, using sheer power to simply out zoom me. I tried to manuver, but with the better turning F4F there as well I just couldn't do anything to escape the Tempest.
Now, why is it set up so that 1940 aircraft have to fight against late 1944 aircraft? I doubt very much that a Tempest and a Bf109E-4 ever fought each other in WWII.
If this kind of "one aircraft to a base" setup is going to be persued, try to keep all the aircraft in the same time frame as well as squadrons of types at bases (personally I'd prefer a 1943 setup), but don't set it up so that 1940 stuff gets randomly squashed by Tempests and 262s.