Using both feet is something you learn while developing as a young player. This is defnitely a problem here at CFC. Zhirkov, Malouda, Sturridge, Cole, Kakuta... how often do they kick a ball with their right foot ? Their technique makes it easier for opposition defenders to close down and don't give them a lot of space.Full backs usually know which side Malouda or Sturridge are gonna pick to dribble. You can have one or two players on the pitch who use only one foot, but others must be able to control and pass the ball with both feet(just like Barcelona does with Messi). Balance is key.