I noticed if I slammed on the brakes mid-air, the car will heavily nosedive the moment I do. I understand along with the intertia of the drivetrain, and of the wheels moving forward with shitloads of torque, suddenly being stopped must throw quite a bit of it in an alternate direction, but really this much, huh? Side note, I was late shifting on some gears because I was fine tuning the ratios.
You have way too much control of the cars in mid-air. If you don't touch anything it will go in a relatively realistic arch. If you apply throttle the car will go nose up. If you apply brakes the car will go nose down. If you steer any direction the car rolls. These are too drastic changes in the direction of the car in the air. The best place to see the most of these influences of the cars in air is in the altitude map later on the main road at the big jumps.
Thanks for the feedback. I would only expect it to nosedive with braking applied, however to that degree I never would of thought of it.
Totally realistic, wheels behave like a gyros and their spinning force allow you to control car in some way while you are mid air, look here's good example: This guy let acceleration pedal off and then panicked and pressed brakes, result is in video. He crashed hard, just because of this. Take your bike wheel (front wheel with axle) and spin if fast on it's axle, then try to turn left or right, you'll see that it requires a lot of force, also you can try to lift back of your bike spin bike's back wheel and lift whole bike and then brake hard it will lean forward.
Protip if you want to to land more upright, mash the accelerator and upshift and the gyro-like forces of the wheels will stabilize the car. Works best on vehicles with very long final gear ratios.