There is no reason to use PKs at the H.S. level, EXCEPT in state playoff games or tournament knock-out stages. There is even less reason in JV games.
People need to understand that a draw is an honorable outcome -- especially when you have a 2-hour bus ride home on a school night.
For high school playoffs, I'd use the current system. If not for the fact that state championship games are played back-to-back at one venue, I'd advocate a 10-minute OT, followed by a golden-goal, as-long-as-it-takes, format, FOR CHAMPIONSHIP GAMES ONLY.