I think it would be a good idea, but I also think it has zero chance of happening. The reason we don't have a nine-game SEC schedule nowadays is because the conference riffraff of Arky, the Mississippi teams, Kentucky, S Carolina, the Aggies, and Vanderbilt (that's fully half the conference, and you can include Mizzou)......they don't want it because there go those non-prestigious bowl games in luxurious holiday spots like Shreveport.
Those teams I listed above are happy with a 6-win season that ends with a bowl game. Right now they make it by scheduling 4 cupcakes (at least 3 and 4 for most of them) and hoping for a 2-6 conference record that puts them at six wins. Force them to give up cupcake for a good team they don't play every year (for example, force Arkansas to actually have to play Florida and/or Georgia in the same year several times), and they'll be 4-8 and watching the mediocre teams play during the Christmas vacation.
I also suspect the conference itself is wary because more regular season Alabama-Georgia games will both knock out one (or perhaps both) playoff participants out of the tournament as well as create what the Big 12 has now - almost guaranteed rematches for the conference title. The SECCG has been fortunate that very few of the games have been rematches. The odds of that increase dramatically when you don't have the participants locked into a divisional setup.
The interesting case cited in the article above is 2013.........does anyone really doubt that had we lost The Play That Shall Not Be Named game the way we did that we would not have absolutely rolled Auburn in a rematch? And taking nothing at all away from that Tigers team, I think that setup is what made the loss more devastating and the win more thrilling for Auburn, the thing that made college football what it was. (And while it is obviously painful to recall, I will confess a certain level of awe at the You Tube videos from the stands of both that play and Rocky Block - it captures the fervor of the live event, and it's one of those moments that are so rare in life).
That game is a fond recollection for Auburn fans and a nightmare one for us - but that really wouldn't be true if the two teams played a rematch seven days later.
Personally, I'm for it because it solves the most obvious problem of "but the two best teams didn't play each other." Let me give a good example of what I mean.
Imagine the year is 2008. Ole Miss loses to Wake Forest (which they did), Memphis (they won that one) and Florida (this was the famous Tebow Speech upset)......but knocks off #2 Alabama thanks to an obviously bad call, and the Tide runs the table. Because of the head-to-head, Ole Miss wins the West despite 3 losses to Alabama's one, two of those losses being pretty embarrassing. Imagine also that in the East, Florida goes 11-1 (as they did) with their only loss to Georgia (it was to Ole Miss as I said above).....whose only SEC loss is to Alabama, and the Dawgs are 10-2, with a loss to Ga Tech (which they did).
You now have a situation where the SEC has two of the nation's best teams (as they did in 2008), both with one loss.......and both sitting at home watching two-loss Georgia play three-loss Ole Miss to determine the best team in the SEC. And rest assured that if that had happened three times in a row, the SEC would have made the necessary changes then.
I'm generally against rematches in CFB because it tends to detract from the luster but.......I prefer rematches of the best teams in place of "well, the best team has to face somebody, so it may as well be the team that won solely on the basis of the divisional setup."
SEC TITLE GAME CHANGES IF THERE WERE NO DIVISIONS
(yes....I realize the schedules in more recent years with expansion would be somewhat different)
1993 - Florida vs Tennessee
1995 - Florida vs Tennessee
1996 - Florida vs Tennessee
1997 - Tennessee vs you tell me (four two-loss teams; UGA and LSU beat UF, Auburn beat UGA and LSU, UF beat Auburn)
1998 - Florida vs Tennessee
2001 - Florida vs Tennessee (the week after the makeup game from 9/11......)
2002 - Georgia vs Florida
2003 - LSU vs Ole Miss
2005 - LSU vs Auburn (SEC champion UGA does not even make the game)
2011 - LSU vs Alabama (presumably the Tide goes because of a better overall record????)