Just my opinion, but this thing that Les couldn't field an offense was way overblown. Some of the most potent offenses LSU has enjoyed was during Miles tenure. When he won the natty in 2007, with Crowton as OC, they were a little too offensively inclined with their spread concepts but scored a ton of points. With the 2 years of Mettenberg as the starter, they threw and moved the ball. With Jarett Lee, he threw the pumpkin. His teams were usually sound at all positions really.
I think most of his trouble came from the meltdown after the NC game with Bama after a historic Bama defense was determined not to lose to these guys a second time. This was historically probably the best LSU team they ever had. He just won the "game of the century" in Tuscaloosa earlier that year and won against us the year before as well. I don't think the fans ever forgave him for not putting Jarett Lee in the Natty game in the second half. After that, every lost to Bama probably felt like 2.