I however don't have FPS issues or lag issues, I am having sensitivity issues. Moving the mouse 1" physically equates to too small of a movement on screen. The amount it moves on screen with the smoothness shut off perfectly reflects how much I move it physically, regardless of the speed at which I move the mouse. The problem is you can't adjust what the amount it moves on the screen is and with my mouse that amount is far too small.
I imagine I could buy a mouse with a higher sensitivity or one of the ones that lets you adjust the mouses sensitivity and solve my problem that way, but it's simple enough to code in a UI sensitivity problem and just solve this in the game like many other games have.