I'm not sure if this was mentioned, if it was I must have overlooked it, but has there been mention of if the triggers, L2/R2, will actually be fishtailed triggers? That seems like a natural evolution of the controller and something that Sony has failed to change regarding the Dual Shock in all these years.
Truthfully, I'd love to see R1/L1 buttons actually be rounded at the top and have a depression along the middle of them that you can rest your pointer finger in. The rest of the button would protrude out past the depression (to prevent slippage) but be of equal length when compared to the top of the button before the depression. Controller would also have a rubber underside, that would aid in grip; at times when I'm playing Folklore and my hands are perspiring, I feel as if the controller is going to "rocket" out of my hands while I'm shaking and yanking. Rubber Gripping would eliminate that anxiety. Add in a more natural, rounded shape, almost crescent like with padded Concave analog sticks and Sony would easily have the best controller, in my opinion of course. The only accommodation that would make my design better (to me) is the option of offsetting the analogs (for all you 360 gamepad lovers out there)