More accurate to say, "I expect to see a much better product now that the defense has better players". Unless we're arguing that the practice squad secondary the Packers have fielded the past two seasons would somehow be good under Pettine. Which would be an amazing argument and, if true, would lead me to believe that Pettine would be the best coach in the NFL since he would, theoretically, turn Ladarius Gunter into a guy that can cover Julio Jones.
I expect a better defensive product for a a few reasons in line with consesus thinking: (1) the long overdue "Fire Capers!", (2) Pettine simplifying for the youth on hand and the emphais on execution over scheme, and (3) upgraded talent at the cornerback position.
But "much better"? King's struggles last season is a cautionary tale when dealing with rookies.
Point (2) may be the most critical element. Until a couple years back, Capers' play calls were an elongated bunch of verbiage with a string of discreet calls for each unit. Whether this was a function of (1) Capers liking to mix and match unit calls on a play-by-play basis, (2) an inherently compartmentalizing mind-set, or (3) a "do your job" approach without having to think about what the other guys were doing, I wouldn't know at at this point and don't care.
"Communication" issues with this approach were then acknowledged. It was said it was taking too long to get those elongated verbiage stings from the box to the players. It was not acklowedged that such an approach may have lost something in translation in the "telephone game" (or "Chinese whispers" for out British friends).
Capers then went to a more compacted, "wholistic" if you will, play calling scheme. The call had everybody's job compacted into a shorter verbiage string. Though we don't know how this worked precisely, we can conceptualize how the change might have caused a different conceptual problem. Let's say there were 5 different calls for each of the units...line, LBs, backfield. That's 125 permutations. Or 10 different calls for each is 1,000 permutations. In the original elongated calling scheme, "do your job" was easier in that the players had to memorize only their own 5 (or 10) calls. In the compacted version of the calls, everybody would have to memorize 125 (or 1,000 calls) and then unpack from it their particular call.
Jump to 2017. How did this work out last season? The playcalling job jumped from Martinez in week 1, quickly to Ryan I presume since he was the guy waving and moving guys around for a couple of games, to Burnett, then to Clinton-Dix when Burnett was injured, and then when C-D wasn't getting it done to Capers (or McCarthy's?) satisfaction, back to Martinez it went. As for C-D, I wouldn't be certain that his problem wasn't just teammates not being able to hear adjustments from the free safty position.
Understand this, Packer fans: your defensive players were often confused about what they were supposed to be doing dating back quite a few year resulting in the thing you want least: the whole being less than the sum of the parts.
Fast forward to 2018 and the creation of "run game coordinator" and "pass game coordinator" coaching roles. That this was also done on the offensive side of the ball might suggest to the cynical among us that more authoratative titles were created to justify pay raises, the fact there there are no longer discreet CB and safety coaches suggests something else. It's a doubling down on that "wholistic" approach with the aim of achieving a whole greater than the sum of the parts. Or, if you prefer a less highfalutin take, it's "let's work together" where "do your job" entails helping the other guys do theirs.
With coaches and players born and bred in the Capers Way and key rookies starting from scratch in the NFL game, I would not be surprised if the season starts a bit rocky on the defensive side of the ball. If that happens to be the case, I'd reserve judgment until at least week 4. The early weeks of the season are generally pretty sloppy across the league in any event.
On the other hand, if this defense comes out guns-a-blazin', we may have to conclude past issues were not entirely a talent issue.