This is kind of a niche request, but should be easy to fix. I was trying to use gamepads (Azeron/Razer/G600) to move my character and a mouse to control aiming/inventory management. Then I found this “bug”: If you are moving a character with a thumbstick controller (DirectInput) and then move the mouse, the GUI switch to mouse+keyboard, but the last (DirectInput) direction with controller isn’t canceled so the character keep moving in that direction until you push a new controller button again. It could be very awesome to be able to use both DirectInput and a mouse at the same time in this game. It also should help people playing with a controller and using a mouse only for inventory management.
More and more games support this feature. Very convenient and good for accessibility (I have carpal tunnel syndrome so this is important for long term play in my case)