yea, or an slider to select shadow quality, or shadow distance, or shadows for threes buildings and cockpit separately.
I have noticed that shadow in ground are too much dark for me. That happended too in il2, someone made a mod that correct that.

Guys I upgraded my graphics card from Radeon 5850 to 6970, and the flickering shadows are still the same, no difference here. So it is not a bug but in the game.. :/