Playing time, coaching, perceived opportunity to be on a better team, perhaps expenses are less or entirely paid for by the new team, etc.
I think that this is where the issues are.
I don't think the two infielders were strong enough defensively to keep getting playing time, they are good hitters but, Sorcerer had better defenders that were also good hitters. Finding a top pitcher is always challenging but, somewhere Phil will find a replacement or an upgrade.
Expenses are a big issue with players once they gain their scholorship offers; parents are often looking for a free ride or at least a cheaper ride in Gold.
One other think AZ is not in Region 14, a decidedly much easier path to Gold Nationals.
Again, having watcher Nor Cal softball for quite some time, it looks like more business as usual for Sorcerer. I think they'll be ready come June.