They barely played together in preseason, so there is no continuity. The biggest issue is they never really addressed the run D.
Generally, I think it's a mistake when NFL teams don't play their 1's in the preseason to at least the point where they're "lathered up," playing as a unit, and getting into the weekly game rhythm of preparing for and playing NFL games. Especially the offenses, and especially when the QB is in their 30's.
I get the avoiding injury with multi-million dollar investments in meaningless games. But you can't prepare to play NFL football wrapped in bubble wrap. And you can get injured four plays into the season, so you've got to start preparing sometime. I would rather not be working on, e.g., the QB-Center exchange still in Week 2 of the real season. The games that do mean something can put you in an 0-2 hole or worse awful fast while you're instead doing what preseason was intended for (over and above making money for the owners).
These guys excelled to get to where they are by preparing. Yes, they've got talent, but you still have to prepare to play at a high level against people who also have talent, which they've done all their career prior to this point.
So, basically, many of them now are multi-millionaires or at the very least making more a year than many of us make. And after living the multi-millionaire country club life for eight months, they're expected these days to just step into real game action at real speed in Week 1 without doing the full preparation that they've otherwise done all their life.
It makes for bad football, and contributes to bad starts.
In particular, putting a 30 year-old-plus QB out into that mix straight from the country club veranda cafe with no real prep leads to, e.g. experienced QBs getting picked by young, hungry DBs who have been playing full out for a roster spot in the preseason. Those DBs are just processing faster than the QB, who is "hot" only off the links.
I get the injury risk, but they need to get ready to play football, and those mid-week team-on-team scrimmages don't seem to do the trick adequately separate and apart from "actual" preseason action in a more uncontrolled, unscripted environment.
But, of course, any team that played its 1s, even only to get lathered up, in preseason games would get roasted in the sports press if and when a key player went down in the "meaningless" game with an injury. Four plays into Week 1 is OK, but . . . . .
The bigger the NFL multi-billion dollar business becomes, the worse the on-the-field product becomes, especially after the last CBA further limited practice time.
Given that the CBA does curtail practice time so much, I would use those preseason games -- which are permitted under the CBA -- to get enough reps in those games for the 1s to get them at least into rhythm for Week 1. You have to be mindful of the injury risk, and they also need to evaluate new talent in the preseason games. But every year we're reminded that these elite players still need prep time and reps to in fact play at an elite level.