Nope. I play with an xbox controller already and its just as good as any joystick. Also xbox will undoubtedly have full voice control via the connect so they will have no detriment to not having a keyboard.
I have to disagree with this too. My flatmate plays on a pad and is the clumsiest CMDR I have encountered which I thought was just him until I tried the pad. I woudl take mouse/kb over a pad any day and I consider that inferior to my x52.