Why would the Big 12 add schools like Boise St, BYU, UCF, Memphis,...? For a conference football championship game? The only schools that would be in favor of these adds would be the schools that would be left out if the Big 12 fell apart. Do you think Texas, Oklahoma, and Kansas would welcome these adds when they probably have better options?
The NCAA is about to allow a conference championship game for the Big 12 with 10 members. What would 2 more schools add to the party?
Finally, anybody who thinks UConn is a good fit for the Big 12 is delusional and anybody who thinks Warde should be fired if the Big 12 expands without UConn isn't rational. If UConn was located 500 miles from Austin, TX, then UConn would have a chance. Unfortunately, it is what it is.