All that is right except you’re glossing over that ESPN no longer has to auction anything for the SEC nor ACC they just pick and choose what goes where now since they own all the rights save for the ACC’s single game legacy Raycom deal now on the CW.
Let’s just look at this week.
SEC has their T1 game on CBS, 3 games on ESPN (main not 2/U), and 3 games on SECN. Texas is playing on ABC and Oklahoma on FS1.
By adding UT/OU we’re not going to see fewer SEC games on ABC/ESPN, we’re going to see more because even the Tier 2 SEC games like OleMiss/LSU, UF/UK, Bama/MSU are likely worth more to the networks than the Big 12 game of the week which this week would WVU@TCU, both currently 3-1 but that game is on ESPN2. Arkansas/aggy and TN/SC are on SECN and likely would be considered more valued content than most Big 12 games.
Sure they could get a small bump form Utah/Colorado but unless PrimeTime has staying power those school don’t historically move the needle enough to justify penciling them in a weekly spot on both FOX and ABC.