This 1 Permanent Rival thing is idiotic and to see anyone in the SEC contemplate it is a sign of just how much they take the fans of its schools for granted. Rivalries are the lifeblood of superior college sports environments. They motivate fans, they engage onlookers, they're the spectacles of the sport - and they are constant fixtures in the lives of fans. You mark your calendar by them. The very moment they mess with that - the year where fans look up in October and think "huh, no Alabama this year," - is the moment those rivalries begin to fade away.
This isn't surprising, though. A lot of people in charge of college football - especially those who steer it for profit - could not care less about rivalries or traditions, or gameday experiences, or any of that stuff. They only care about what they can package to sell to someone in the future. As long as they have "college football" to sell, who cares if it's a rivalry or has any tradition or logical sense to speak of? How else could you end up with Missouri in the SEC?
But here we are. Held by corporate hands which would gladly wring the SEC - and college football - dry of its traditions before it's all said and done.