Imo I think the steam controller didn’t take off because it relied so hard on the touch pads (the touchpads also clicked, which I didn’t like). Now with the steam deck it adds two real joysticks, and pressure sensitive touchpads which are so much better. So if they were to make a steam controller 2 it should have two joysticks as well as two touchpads. Pretty much all they have to do is make the steam deck without the screen.