The above said, we'll really have to see how it plays out, though. If the officials enforce the rules uniformly as written, unless there's a massive change in on-field behavior, I'd estimate that probably 50% of current players would be out of playing club soccer forever by the end of the year (given how many periodic bad calls there are, and how many people get upset about them over the course of a season, both players and parents). That might actually be quite good for reducing the overall cost of club soccer for parents, and assuming no increase of physical violence against referees, would also increase the effective ref/player ratios. So... I guess on balance it might work out, irrespective of the impact on soccer in the US.