Change the visual aesthetic of it too while they're at it. It mostly looks nice but the touch pad is ugly as sin and the controller doesn't visually match the hardware. The Xbox One hardware and controller look like they belong together for example, but I don't find that to be the case with the PS4 controller. It's a good controller and feels nice and a huge improvement from the PS3 one, but I think there's an air of tackiness about it. The touch pad makes it look like a prototype instead of something to actually hit the market.
Not saying they should remove the touch pad, but in its current form I really don't like the look of it. Maybe but some kind of logo in the middle of it or something.