S!
Getting the P-51b is a step forward, but where's the P-47D-21 Razorback, the P-38H, the 110G, the Ju88C, the B-17F, the B-24, the B-25 and the Spitfire Mk IXLF?
The Crucial period of the war, July 1943 to June 1944, when the Allies, primarily the US 8th A.F., fought for and won air superiority over Europe, still can't be modelled in a Scenario.
Everything after that was gravy. The Germans never seriously challenged for control of the air after the Spring of '44.
Most of the German aircraft modelled in AH are being forced to deal with Allied models which are not of their era. The only exceptions: the Dora, G10 and the ludicrously included Ta-152H. (Did someone say 10 aircraft actually saw combat? I'll bet the 152H's saw more flight time logged with Allied test pilots than German Combat ones)
The Pacific theater is even worse. (and something tells me the F-8F is going to be modelled too even though it never saw combat)
And what's the betting the F-86 will appear before AH gets a single early war aircraft?
Well, that makes my decision easy: IL-2 it is.