UCLA/Stanford double alum here: the damage is done. The California schools belong together and UO/UW are great acquisitions for the B1G. This was the obvious move as soon as the LA schools jumped and I assume it was part of the original negotiations (with USC).
Why? As a UW fan I fucking hate this. I want to watch my team play teams in my region. I don't care about midwest college teams. I'd rather have stayed in a decimated PAC 12 with our boys WSU out of principle.