I actually pretty much disagree completely with the OP.
1. Saniya has established herself as the go to starting point guard and the one that the coaches really trust in big games. Don't see that changing any time soon. Crystal is going through a serious funk right now. So ... welcome to blow out city - Chong gets the start and the team establishes itself, and then Geno starts finding minutes for Crystal and Natalie (who I think the coaches 'trust' more, right now, than Crystal.) Start of the second half same situation. Chong gets a fair amount of minutes at the end of the game because she is the one starter who hasn't played as much, and she can help try and organize the bench players.
2. Yeah Molly is getting more minutes than Kyla so in that sense she is 'closer', but they are still both miles away. If USF is able to make a game of it, they will both be glued to the bench.
When Crystal comes out of the funk things may change a bit - but unless she consistently brings her Baylor game, Chong will remain the go-to PG for tight spots.