I'm all for a redesign of the PS controller.
I always thought it was weird how the left analog stick, despite being the primary way of controlling your character, is still tucked away to the bottom.
The controller is shaped so that your thumbs would by default rest on the face buttons and the d-pad.
Now that the d-pad is mostly obsolete for movement within games, it kinda baffles me how the d-pad still takes up the primary position on the controller.
The Gamecube controller did it right, for example. Putting the stick on the left and the d-pad to the lower right from the stick.
It might mess a bit with the aesthetics, but if you're more concerned about the looks of a controller than its functionality (see also boomerang controller) you're doing it wrong.
And I know there's going to be the obligatory "I never had a problem with the layout" comment and while I actually did at first (and preferred to play some games like MGS2 with a d-pad still), I got used to it.
BUT. I'm just saying there's always room for slight improvements.