Mia Mastrov is a Pac-12 player, no doubt, and so is Jzaniya Harriel. I don't know if either is a star at that level -- Mastrov is a better defender (she's a better defender than almost everyone) but Harriel is a better scorer. As is almost always the case, how they fit with their coaches and programs will be the key.
We played Woodside Priory and I loved Augmon's game, but from what I saw, she is not a good shooter. If I recall correctly, she even struggled at the free-throw line, and had no perimeter game at all. Superb defender, played hard, good leader -- but don't know if she's a difference-maker in the Pac-12.
Mitty vs. Miramonte: Mitty is a lot better than we are, and driving to San Jose to lose by 30, and then having them come back to Orinda and do the same, is not that attractive an option.
The other aspect is this: We might always draw Mitty in postseason, and our best chance to beat them would be that they aren't really familiar with our particular style and would take some time to adjust. (Joe Guerra would have us scouted to perfection, of course, but sometimes it takes the players a quarter to figure things out on the court.) So maybe we steal a couple baskets, bank in a few threes, get some (a lot) calls to go our way and we escape with a win. But if we've played them earlier in the year, no surprises and sadly, less chance of an upset.
"To be the best, you have to beat the best" is true in postseason, but otherwise doesn't always apply. Mitty is head and shoulders above everyone in Northern California right now, so it makes sense to save whatever bullets you have -- and we won't have nearly as many this coming year -- for the playoffs.