You can get things to put on top of the sticks. Commonly used on the scuf controllers. They'd rectify sticks that are too small. Although we could see a controller update,remember the original xbox, the controller was huge and annoying and was then replaced by a much better smaller controller.
Haha good times with this monstrosity
http://static.giantbomb.com/uploads/...0509-xbox_.gif
replaced with the much better :
http://www.deafgamers.com/oldreviews...troller_s1.jpg
The second one you can tell they based the current 360 and XB1 controller from.
Side by Side:
http://womeningamestudies.com/wp-con...controller.jpg