Cal/Stanford are perfect. They close if Cali. Yeah there’s others but they’ll never match the big 4.ASU, Utah and Colorado produce 0 national interest in terms of tv ratings. Oregon generates top 10-15 level tv ratings and as such they are a valuable addition. Washington does ok with tv ratings. Stanford and Cal serve no football revenue purpose, but likely are valuable additions for some school presidents that want academic affiliation with the Bay area/Silicon Valley.
Also if you only add mega programs it hurts long term. Programs will lose and suffer. Look at Nebraska. They aren’t the same as they were. If you only add usc and Texas type some of the good programs will suffer. You need lesser programs.
Plus other sports beside fb they are very good.