So, I just tried using a PS4 controller as a joystick in the game. (Currently without my regular joystick, trying this as a workaround in the meantime...)
Left analog stick handles pitch and roll, as I would expect. But, I'm not too keen on using the right analog stick up/down for yaw/rudder. Ideally, I'd like L2/R2 (which, if it behaves on PC like it does on the PS4, should be analog), but I could get used to right/left on the right analog stick.
Is there any way to reassign the yaw/rudder axis, or is it locked to what I have?