How to Make Bad Controllers Good

Nintendo 64 Controller

 * Remove the Left Third That would make it harder to use.
 * I would say that we would move the analog stick to the left and move the D-pad elsewhere. Oh wait....

Xbox 360 Controller

 * Make the controller less heavy.  Ok, You have to have Spoons for Hands if you think the Xbox 360 controller is heavy.
 * So it matters on a person's strength?

Atari 5200 Controller

 * Remove the numeric keypad and replace the four buttons on the side with the simple red round button from the Atari 2600.
 * Fix the faulty controller.

Power Glove

 * Make its movements and gestures more responsive.
 * Remove the unnecessary coding buttons on top.

Roll n' Rocker

 * It is made by Nintendo instead of LJN.
 * The tilts are read more accurately and responsively and allow for a wider range of actions.

Atari Trackball

 * Shrink it and let the "ball" respond better. Also, it can be pressed on, making it act like a button.