It sure looks like the Pac-12 may go to a North-South split. It seems clear to me that a zipper schedule would actually be, you know, fair. Arranged correctly it could even preserve the Cali games. But, no, apparently the commissioner thinks that anything other than geo-based divisions would be "too confusing" to people outside the conference.
Here's an idea, commish: cultivate the best option within the conference. Jerkface.
Check out the "Pac-12 cooler" if you are interested in a conference alignment that makes sense.