Honestly I don’t think the schedules will be THAT much worse for the current big 10 west teams.
USC is a paper tiger and will lose games they aren’t supposed to lose (the same way ISU beat some of the Lincoln Riley OU teams).
Teams like Wisconsin, Iowa, Nebby, and other decent west teams will have to deal with MAYBE one or two more hard games a year.
Assuming they get an upset every couple years, I think Iowa goes from being an average of 9 wins to maybe 8.
Even if Oregon is great and USC/WA are pretty good, Rutgers, northwestern, Illinois, Indiana, etc. all still exist.
The Iowa/MSU/Nebby/Wisconsins of the world MIGHT average one less win per year, but I don’t think that’s a guarantee.