Besides Montana, three other Big Sky WBB programs are making a coaching change: Eastern Washington, Northern Colorado and Sacramento State. I checked the NCAA WBB transfer portal this morning. Montana has three players in the portal, EWC has eight players in the portal, UNC has six players in the portal and SAC has three. Weber State (no coaching transition of which I am aware) has four players in the portal. All other Big Sky schools combined (the stable ones?) list a total of three players in the portal.
Of course the number of departing players at any school may be higher, but the transfer portal doesn't currently reflect that. I personally reject speculating upon the "method," of roster change made by a specific coach, unless it's made public by some public statement or complaint. I'm all for Trust. Coaches are normally very careful about respecting individual privacy, and follow standardized procedures, about respecting the privacy rights of their players and parents... for many good reasons.
I, was a strong supporter of Mike Petrino and his outstanding staff, all of whom I consider to be professionals of the highest personal and professional caliber. Unfortunately, their jobs were casualties of the previous (non-interim) coaching tenure. Change was mandated and made, and I'm not interested in further speculation re: how we got here. There is a new head coach of MontanaWBB. (I do admit that, similar to PlayerRep, I feel some hurt regarding the interim coaches who were let go)
Regardless, the statistics above indicate that -- with coaching change, team rosters also undergo significant change. The incoming coaching staff (including retained asst., Jordan Sullivan) is now running the program. SO, I wish coach Holsinger, Sullivan, and Harris all the best through this difficult initial process. Go Griz.