Using the face buttons to aim a staff is a bit more difficult, but if you practice you should be able to get everything working smoothly. (ie be competitive)
It's literally a "practice makes perfect" scenario. Don't let the controls stop you from buying the game. It's a great game and the controls just take a bit of getting used to.
Aargh, you are one of these guys that totally would whoop my ass online. It seems I suck at this. But it's fun anyways.