good point, however, if front foot starts closed it causes the following to happen during the throw: front hip pushes out to the side and front leg locks, also causes upper body to go side to side.
the direction im going with this post is that the strongest throw from a position player should come from a right fielder. if you break down his throwing motion as he releases the ball -- im not talking about crow hopping, just the position his body is in--- you will see that his hips are more open then closed and the foot position is actually open. i believe this is why outfield throws have more carry and are straight and generate the most velocity.