Sorry, I just can't accept your assessment that, "Under the previous rule, the ONLY thing that was RTP was "charging into the passer", nor do I believe believe the vast majority of NFHS officials would either. I do hope the revised language will eliminate those who believed that prohibition to be so limited.
You can refuse to accept my assessment only if you ignored the rule book.
9-4-4: Roughing the passer. Defensive players must make a definite effort to avoid
charging into a passer, who has thrown the ball from in or behind the neutral zone, after it is clear the ball has been thrown. No defensive player shall
charge into the passer who is standing still or fading back, because he is considered out of the play after the pass.
All of the other things you mentioned are in 9-3-3, not 9-4-4 and are personal fouls, NOT roughing the passer. Personal fouls do not carry an AFD, RTP does. In most cases, no one knew there was a problem, because in most case, the LTG is less than 15 yards away, so it was a first down anyway. But there were those few cases were the LTG was more than 15 yards, or half the distance, and in those cases, the penalty was being incorrectly applied.
The committee saw this was a problem, and fixed the rule. Perhaps those should have been RTP all along, but they were not. Some officials were ruling incorrectly and calling the PFs RTP. Officials that were calling it correctly were catching h#ll, even though they were correct. If it wasn't a problem or wasn't a "loophole", why did they have to pass a new rule to fix it?
It's no longer an issue. Next, they need to apply the same standard to roughing the kicker and roughing the holder as well.