Update the Yaks, add the -7 and -3 variants, and add some additional Soviet fighters...
...namely, the LaGG-3 and MiG-3.
I always had an interest flying the LaGG-3, flying IL-2 I thought it was a pretty awesome aircraft until I realized the 109E pretty much outclassed it in every way. However the armament really made up my mind, two 50 cals and a 20mm is the same what our Yak has, however given some of the other armament packages of soviet fighters (Mig-3) I felt my aim sucked enough I much rather have the 20mm.
Mig-3 is going to be terribly underarmed, one 12.7 and two light machine guns, however it did have the option of twin 12.7s in gunpods - however flying any other aircraft with gunpods, its going to do "ok" against bombers, but meat for fighters.
Either way I will like the challenge of flying it, what i wouldn't give for a twin 20mm version of the Yak-9.