I know that the majority of people like to use controllers, but some of us prefer keyboards. I am not criticizing the developers' work or anything, but it would be nice if it was easier to control the vehicles using the the keyboard... Still an epic game nonetheless.
There's not all that much you can do besides dumbing down the physics to make a simulator accessible with keyboard. You wouldn't have much of a good time in other sims with keyboard too. I think if you get used to the keyboard controls it's really not all that bad.