Thanks for the comments. I do believe it as about quality and not quantity. The Alliance games will draw way more eyeballs than, for example, Washington State vs Texas Tech type matchups, of which there would be many, which networks don't get jazzed about. None of the remaining Big 12 teams bring enough name cache to get the networks excited and the SEC knows that.
USC was a bit of a dumpster fire when Pete Carrol took over and by year two they were winning the Orange Bowl, It will be a quick bounce back, this is not like rebuilding Oregon State. USC has talent and Riley is bringing in more, the Oklahoma qb, williams, just entered the transfer portal, safe to say he's probaly looking at SC.
Also, there will be a next round of expansion, serious talks seem to happen every 5-10 years, if down the road bringing in some of those BIG 12 teams makes sense then it could get donw.