The hardware is perfect as it is. It shouldn't be slimmer, it is more comfortable to hold this way. PSP fat is also more comfortable than the slim one in my opinion. It should be carried in a case due to analog sticks, and after it is in a case shaving off a few milimeters does not really make a difference.
The main problem it has is the price and without a significant price reduction it will not sale that many whatever they do.







