The northwest rivalries, ease of traveling to an away game, tradition....this is what stings the most. On the other hand, the P12 has been trending down, home attendance not good, there are only a couple conference games that move the needle, so playing in a major conference might bring some life to seeing some big home games, and recruiting might improve. UW will need to get it's shit together for NIL though
As much as we love a lot of things about the tradition of college football, some things have been breaking down, and not just in the Pac-12, and committing to the TV money and the five programs that are rolling is about the only sure thing the sport has, and even that seems short term to me.
I remember talk about even some attendance issues at Alabama. I don't know if attendance issues will ever be resolved at USC and UW.
I personally think taking away the regionalism of the sport will cause long-term problems and the eventual creation of essentially a minor league will keep future generations from not getting into college football.
My biggest selling point would be just changing the name to the Saturday Football League and making the tagline "It's better to get drunk on Saturday."