Penalties are much more about luck than ability - the keeper pretty much guesses which way to go.
A talented, confident player with a cool head should never not score on a 1:1; whereas a bottler will always struggle.
A talented, confident player with a cool head should never not score on a 1:1 like a penalty situation yet ronaldo, messi, robben and even rvp have missed this season.
see my point?
running from the halfway line is not solving the problem and simply adds distance to a 1 on 1 situation. the underlying factor will still be luck and we need to move away from it.