People need to realize that this is a strategic move for both TA&M and the SEC. For the Aggies the long term benefits greatly outweigh and short term setbacks.
For the SEC they are also positioning themselves for the future. The Big 10 has fired the first shot and that is the competition. Delany is attempting to regain prominence through expansion because he knows he cannot do it otherwise. Should the SEC be left out of the expansion feast by the Big 10 and Pac 12 it could bring a shift to the college football landscape. Slive is afraid of being "regionalized", especially as the Big 10 correctly identified expanding into new regions rather than existing areas as key to their agenda. The ACC basically shares the same footprint as the SEC so there is limited value there. The Big 12 is the real prize here and it's proven to be vulnerable to raids.
In the short term the SEC doesn't need to prove that the league has "increased value". All they really need to do is renegotiate at existing "fair market" value. They inflated contracts signed by the Big 12 and Pac 12 now make the SEC vastly undercompensated. The SEC set the bar but then competition gave the ACC, Big 12, etc, roughly equivalent contracts despite inferior programs and much lesser ratings. If the SEC can now get their value from CBS and ESPN, it will be a win. Or CBS could go hardline and risk losing their cash cow. When you look at other programming, networks have proven again and again that they will overpay for a product rather than risk losing it altogether. The networks know who is king of college football and they will strive to keep the king satisfied and happy.