Why would he leave if he has an easy opportunity to make the NCAA Tournament and win his own conference. Which he has not lost in 4 years. This year alone, he has 3 and if John Wall signs that will be 4 players within the top 10. That is a ridiculous recruiting class, and probably the best since the fab 5 back in the early 90s. His strength of schedule will be somewhere within 60-100 next year. He will have plenty of time to develop the incoming freshman and he actually has talent, even when Antonio Anderson and tyreke evans are gone to the NBA.
Trust me if you are thinking just current situations, I would never want to leave memphis, especially not in the next 2 years with the talent he has.