Where? Pelini gave up 70 points to Wisconsin and their 3rd string QB because he can't adjust to stop the run. He got worked at Youngstown by Indiana St, which was a program that couldn't win a game for seasons not long ago.
I am not referring to how his DBs play the ball in the air, I am talking structurally how he devotes his 2nd and 3rd level to the pass first, which has caused him to get run over by any team with a QB who can run the zone read, and any team mixing in Jet motion so that all the adjustments he makes his players check to get exploited. This is hardly new info.
Sure, he'll have better players at LSU than Nebraska. But he's no Aranda, and LSU doesn't have near the depth of talent on D they had the last couple of years.