Oklahoma’s plunge into Nebby like irrelevance begins today.
I don't think they will even come close to Nebraska as Nebby's decline started several years before they left the B12. OU even at its worst will beat a ranked team here and there.
I do think the SEC is so Blueblood-heavy that teams are going to be very unhappy. Most will not make the SEC title game consistently, and it will still be challenging to get the 3-4 playoff second bids because finishing top 3-4 is much harder than finishing top 1-2 in the Big12.
OU is down compared to where they are usually at, and it will look like they "can't hack the SEC," but in reality, it's more about the coaching change IMO.