One more quick suggestion – maybe add a mapping for joystick for the ‘neutral’ position too; that’s to say the neutral position of a joystick that it automatically returns to when you take your hand/thumb off of it. If this mapping is set to a key or action, then it is fired when the neutral position is switched back to from a non-neutral position (such as top, left, etc…).
This is useful when you want a gamepad analogue stick to emulate the functionality of a joystick’s hatswitch; as their behaviour in games are typically such that you only look in a certain direction while your thumb is pushing the hatswitch in that direction. As soon as you take your thumb off the hatswitch, the view snaps back to forward/normal.