FSU had a slapper that stepped way out of the box every AB. Never called. Same for Oregon. Not sure it has been called at all during the WCWS.
They need to eliminate the new rule since it's obvious that it can't be consistently enforced. Same thing for leaping. Letting Barnhill crowhop is unfair. Just eliminate the rule and level the playing field.
The part I don't like about the rule is any part of the foot out of the box and your out. The rule should be your entire foot must be out of the box then the rule would eventually go away. We also need challenges like baseball with each team getting three challenges in a game. I'd really like for coaches to be able to call teams on some particular things that their pitchers and hitters do during games.
No challenges. Better rules and better umps.