If you go back and look at the best defenses in CFB over the last 5 years, they don’t lead the nation in sacks. Sacks are awesome, but they don’t correlate (much less cause) good defense.
Defense is all about control. Are you forcing fast pass plays and requiring teams to keep a RB/TE in to block? Are you forcing the QB to move (or forcing him to stay in the pocket when he wants to escape)?
If a DL gets quick pressure against a 7-man protection and forces the QB to roll out of the pocket and throw the ball away or check it down, that’s a huge win for the defense. But the win is invisible on the stat sheet.
The best ways to get a lot of sacks is to take risks. A speed rush attacking a tackle on his outside shoulder might get home, but the tackle could just as easily push the play upfield and give the QB a nice lane. A blitz might get home, or it might set up an explosive for the offense.
Any bum can get pressure. It’s just math. An elite defense applies pressure while maintaining gap integrity and forcing the offense to play off balance.
My eyes say that Pearce having a great season so far, but that expectations may be a little inflated based on getting lots of sacks last year. He’s affecting the game.