I would like it if you could split and re-combine the controller whenever you feel like it. It would make it easier to use for motion controlled segments in games. And sometimes it's more comfortable not to have to hold your hands together all the time. Wii mote and nun chuck is a pretty comfortable setup, just why didn't Nintendo include a 2nd analog stick doh! 2 nun chucks that can be combined would be nice.
Maybe slightly extended the dual shock so there can be buttons under your middle and ring finger on the bottom of the controller. RPGs can use some more configurable hot keys.
I would be happy already if the improve the triggers L2/R2 and provide better grip on the analog sticks. Do not swap the left analog stick with the d-pad. Last time I checked my hands are symmetrical. I like it the way it is.







