You want my opinion too, I just know it. Going on down the rumor train, rohan davey has/had been working with JJ and he pretty much told Les Miles to start Lee instead. Apparently JJ has the skills but can't make the reads. The majority of JJ's passes are either long ball attempts or passes to the flats. He hardly ever attempts intermediate passes over the middle and he's timid about the ones he does.
As far as JL, I think he should at least have a shot at the QB again. 2008 he was fresh and couldn't make reads(leading to all his interceptions), and the defense was terrible. Though the offense did put up a lot of points. 2009 the OL was terrible and he looked bad the one time he started. This year I think is a better situation for him. The OL is better, JLee can hopefully make the reads that he needs to, and the defense looks much improved this year.
If JL can make the right reads, the offense will be dynamic. If not, then LSU is SOL for a few more years.