In Arma 2, one could steer a car smoothly with the mouse, as long as this option was set in the settings.
So I wish for there to be a hotkey in Arma 3, that can enable that same feature by simply pressing a key. This would not be a toggle, but would allow this feature to be enabled as long as a certain key is pressed and held down.
Example: Press "w" key to accelerate a car while also holding down "f" key for enabling a temporary mouse controlled steering of a car.
This solution is imo much better than having to go into the settings for enabling this feature of being able to steer a car with the mouse, as one can more easily choose and more easily switch between having such a feature on or off.