You could be right...it's possible that the SEC is a bad move for Mizzou. Clearly the B1G would be a more natural fit, but I don't see them expanding again unless ND jumps, and that might be never. They got Nebraska (AAU? We don't need no stinkin' AAU!) Huskers and that's it.
I guess I'd look at past situations where schools have moved conferences (Penn St. to Big 10, Arkansas and SCar to SEC, Miami and VA Tech to ACC, etc.) for examples. Every case is a little different, but none of them suffered dramatically for a long period of time. I think all of them would make the move again, if offered the choice. We'll see if the recent transfers (NU, CU, TAMU, Pitt, etc.) do the same. (Colorado may prove to be the exception - they went from irrelevant in one conference to SUPER-irrelevant in another!)
I don't think it's all ESPN's fault that our conference matchups aren't very compelling. When Arrowhead is half-full for Farmagedden, that's a sign of apathy. Everybody knows that Cyclones will pack the Jack for a compelling matchup (Iowa, Nebraska, Texas this weekend, etc.) For those of you who remember the Florida St. matchup in KC several years ago, how did that atomsphere compare to the KSU game? (I wasn't there, but I heard it was rockin'.) Mizzou and Kansas will probably continue to play...both teams have a lot to gain from the matchup (just like Iowa-ISU...even if the Hawks won't admit it!) But as for the other games, I don't think it's a good reason to stay in an unstable situation.
As for stability, I can't believe that all it took was for the governor of Missouri (not a university employee) to say that the Big 10 would be a nice fit for MU, and our previously-stable conference starts to fall apart. The instability didn't start with Mizzou but from the beginning of the Big 12, with the unusual way revenues were distributed. That's on Texas. If Ohio St./Michigan (in the B1G) or USC/UCLA (in the Pac-12) used their influence as conference heavyweights in the same manner, they'd be unstable too. That behavior destroyed the old SWC, drove off 1/4 of the Big 12, and is keeping other schools (like BYU) from joining us. Nobody's jumping ship because of anything MU says.
We may be outliers in the SEC, that's true. I'd argue that we're already outliers in THIS conference...along with 6 other schools.