According to the Notre Dame guy who analyses film on TOS, the Secondary is the major area of UNC defensive incompetence:
"While sophomore SS- Cam'Ron Kelly (No. 9) and sophomore FS-Don Chapman (No. 2) rank third and fourth on the team in tackles, do not be fooled by those stats. These two guys have been turnstiles on the back end of the defense.
They’re storm chasers. They chase and chase and seldom catch up.
Analyst Todd McShay said Kelly does the dirty work on the back end of the Tar Heel defense. Translation: He doesn’t make plays. Chapman has been seen on film numerous times simply not playing hard. It’s as if he’s so accustomed to giving up big plays that he just dials it back.
The entire North Carolina secondary spent the afternoon against Wake Forest looking at one another, confused as to what coverage they should have been in. The Tar Heels won the game, 59-53, but trailed by 21 points because their defense had no answers for Wake Forest QB-Sam Hartman and the Demon Deacon attack. They gave up 606 yards total offense and won.
CBs
Patrice Rene (No. 5) will play physically and make plays. But they miss injured CB-Storm Duck. NB-Trey Morrison (No. 4) has been beaten badly at times, flagged for interference penalties and will take shallow angles to the football. CB-Ladaeson “Day Day” Hollins tends to be among the more confused defensive backs when things break down.
There’s a reason why North Carolina is 92nd in the country in passing defense despite averaging more than three sacks per game. They don’t make plays on the back end of the defense."