Yay, thank you! I couldn't handle this either.I found the motion Blur adjust in CM. You go to: Settings/custom shaders patch/Extra Fx and there you can choose to activate or not motion blur and the amount you want. You can even deactivate for interior cameras, which I did. So it's just a matter of fiddling it to your personal taste.
My other issue is with how much tire smoke there is; anyone know how I can tone it down? Is it a volumetric or dispersal thing..?