Mizzou to SEC is the worst scenario for UConn. SEC stands pat. ACC stands pat. Big XII gobbles TCU, WVU or Louisville along with BYU. Possibly all of them.
I still don't see it. While it was a confederate state, nobody in St. Louis or KC views themselves as southerners. It's the midwest. I think this announcement is all about the new comittment and Mizzou's long time wish to be in the Big Ten. They've been pining for an invite for years. With the B1G at an odd number, before locking themselves in with the Big XII for a long time, they have to make extra super sure that the B1G won't take them. Once that is clear, they'll sign on with the Big XII.