I think one of the things with the offense is that it feels like they're at training camp level of cohesiveness. Harry and Sanu have basically had 3 weeks in the offense. They only found out that David Andrews was going to be out for the season at the end of training camp, and the offensive line is supposed to be "healthy" for the first time all season, but now Karras is out, not that he's great or anything.
Watching them, they're basically at preseason effectiveness. I think some are conflating Brady playing poorly with Brady declining. Physically, he looks the same as any other year. It's all mental, and I don't think anyone feels comfortable in the offense right now. Part of the trouble is that they had all of these additions to the offense right in the heart of their schedule.
There are benefits to having your schedule start off easy, tough in the middle, and then end easy, but the expectation was that they'd have gelled by the time they got to November. It's probably important to remember that their two worst games of the season were both on the road, while this is a team that hasn't lost at home in two years (10/1/17). Home-field advantage is likely gone, but they still have a chance to get a bye and at least one home playoff game.
The one thing with the offense that I want to see is visible improvement from week-to-week. It feels like that hasn't been the case this year, but there's still plenty of time left in the season. At a minimum, the redzone offense needs to be brought up to an acceptable level.