A GIGANTIC rotation of the torso can result in the inside of the toe comming off the ground. If you can do it, all the more power to ya. For the rest of us less flexible people who don't need to bring the club pointing back to the target at the finish, I prefer a flat front foot for several reasons.
It's an indication of better balance, it's indicitive of what I believe to be a proper hip turn, and ensures that a person is swinging FORWARD rather than up or pulled away from the ball.
It is possible to have a straight or even draw ball flight when rolled out, although much more difficult and requiring some manipulation of either the setup, grip, or armswing.
Your balance on the finish is DIRECTLY tied to the swingplane so long as you let it be. It's always possible to FORCE some other situation but good luck doing it consistently.