I find the analog sticks with GTA V way too sensitive. During the opening Franklin mission the vehicle would spin out of control with the slight movement of the right stick. Turing the vehicle is stable when driven slowly but attempting to drive fast (which is required to keep up during the mission) and I can barely drive straight without zigs and zags.
Any suggestions would be appreciated.
Finesse is not the issue and there is no in-game sensivity slider.
Well, you're going to have to learn to use some finesse then. Take a little time to drive around when not on a mission, and learn not to overcompensate for the oversteer.
There's that old saying about how to get to Carnegie Hall; Practice, man. Practice!