For comparison's sake, look at Ole Miss's SEC offensive production:
2009: 22.5
2010: 24.25
2011: 11.625
2012: 28. This marks the beginning of Freeze's tenure.
2013: 22.5
2014: 25.25
2015: 30.33.
So, Mullen's offense has been more successful against SEC defenses than Ole Miss's offense in TWO of the years out of his seven years at Msstate. One of those years happened to be Houston Nutt's last year. Who is the offensive guru?
I think we can close the book on Mullen being a great offensive coordinator. 2014 was a damn good year because we had a NFL receiver (Wilson), NFL RB(Robinson), an NFL QB(Dak). The Oline didn't have any NFL guys. When we have an offensive line like we did in 2009 (thanks Croom, seriously), we can be successful with a midget at QB and disasters at the WR position.
Only comparing to Ole Miss because they should have similar talent and similar opponents.