Those three conferences should really become two. Oregon, Washington, Stanford and Cal fit culturally with the ACC, and Oregon State, Washington State the Arizonas and Utah fit the Big 12.
If you could operate truly collectively on a national scale like that, why be beholden to traditional notions of a conference at all?
Football: a nationalized four-division promotion and relegation system that is thereby adaptably always putting the strongest football teams together for TV marketability and strength of scheduling purposes
Basketball: One elite national top division combining the blue bloods (and inviting Gonzaga) working with Nike and a broad spectrum of NIL partners to evolve toward multi-year commitments for top talent. Then the remainder of the schools split into two geographically based "conferences".
Non-Revenue Sports: Four compact regional leagues of no more than 10 teams, getting rid of all the travel and scheduling problems that these programs have had to put up with and significantly saving costs for everybody, while concentrating the regional rivalries.
Something at that scale could regulate transfers and scheduling, using both markets to its advantage. The B1G/SEC duopoly wants a lot of access to the ACC/B12/P12 as revenue sport non-conference opponents. What if they were forced to bargain for that access collectively rather than picking off each helpless little school?
None of the old rules apply anymore. College sports as we knew it is over. The leftovers are just roadkill unless they can find a way to dictate some terms in the process, and their only path to doing that is together.