A real tron stick might help with control... but its a lot deeper obviously...
What i think you are talking about is a typical analog stick for pc's. They have the springs in the center of the shaft... making it initailly hard to pop out of the center... yet too easy to get to the edges too quickly.
Its sorta like a gas pedal -vs- Brake pedal in a car.
To fix this... I hacked a good bodied analog stick and added a set of bike tires in an " X " shaped fashion. This
makes it considerably harder to push the further you go outwards from the center...
(yet nicely enough is easy to move arround in the center so as not to mess up accuracy like the other sticks)
I specifically made this for the game "Sinistar" and it works AWESOMELY! However... it also works much better at ANY Analog stick in any game. I now wish that all analogs were made this way...



I never tried it with digital controls... so if that is what your after... you might consider hacking a happs joystick or using a trigger topped stick that they also sell.. as both of those have shorter depths than a real tron stick.