I read an article about the Pac 12 breakup. They were late to the game for negotiating TV contracts so, USC and UCLA said adios. Oregon and Washington joined them a bit later.
Each team you mentioned are heading for established conferences, at large division. They won’t lose the money and will probably get more as the further east you go the more network coverage they’ll get. There are more than just NBC, ABC, and CBS out there which includes locals that are paying also.
wy69