I agree that O'Reilly didn't expect to find more exposure through PP; it was all about getting better, part of which was functioning within a team structure where he was
not going to be "the guy" who seemed to have the green light to shoot whenever he wanted. Had to be much more selective at PP, or he wouldn't have played as much as he did this year.
I'm guessing defending these very-talented teammates in practice every day also was good training for him. Of course, defending the high-class athletes on the other teams PP played against also had to have been a good learning experience. Note I'm not saying that Campo "didn't play anybody", but that PP likely had more tough games against elite players over the course of the whole season, and probably a wider variety of athletes to deal with.
Physical conditioning was important, too. Saw him at a couple PP games, and late in the season at some Campo games as a spectator. To my eye anyway, he looked
a good bit trimmer and fitter than he did last year at Campo.
I'm not saying a prep-team like PP is the best fit for everybody, or even a majority of HS players, but I have an idea it did more good things than bad for Matt's future, *mayyyyybeeee* enough to make up for the excitement he missed by not playing with Campo in that great playoff run. Of course, it's possible some of his PP teammates may not have enjoyed the year in prep ball as much as they would have on their HS team... As they say these days, "your mileage may vary".