So if Florida and LSU win their respective divisions, who would they play in their other game?
My guess is that they would play the #2 team in the opposite division instead.
However, only once have permanent opposite division opponents have ever played each other:
Auburn played Florida, when they were still part of Auburn's two-team permanent rivals. Otherwise Auburn has played Tennessee & South Carolina
LSU has played Tennessee & Georgia
Alabama has played Florida
Arkansas has played Florida & Georgia
State has played Tennessee.
(Note: rematches have happened several times, like LSU-Tennessee in 2001 & LSU Georgia in 2003, but only the 2000 Auburn-Florida game matched permanent rivals.)
Playing each other in the regular season makes it harder for one of the teams to win the other division.
Interesting suggestion. Send it up.