I think the Xbox controller is fine as is. Having played a fair amount FPSs on the PC it is a lot easier to aim with the pointer/wiimote tho I prefer the mouse. I play all my analog FPS on max sensitivity and it still holds decent. TBH I would not like the use of motion control on a controller for much of anything in an online enviroment. Thats just my opinion tho.
And does anyone take Cliff Blezinski serious anymore? He seems to be on a roll with quesionable thoughts lately.