I am old school and grew up in the NASL years. Back, when we played in high school, when the game was tied and gone thru OT and Sudden Death you went to the Shoot-out, at the desgnated spot 35 yards out from goal a player starts and moves toward goal to score on opposing keeper, they have 5 seconds to score. Very similar to hockey. This would give you a more exciting and fulfilling ending then pk's. Just a thought.