To put in a context which does not fit but is easy to understand right now this team to me appears to be an A- and we hope to make it an A, A+ or A++
OK, but then the title is misleading, seeing as it is less an "issue" and more "interesting factoid." The Packers may have more
improvement potential at WR than they started the preseason with, but I bet they'd happily trade it for the return of Jordy Nelson.
I also think there is a fundamental disconnect between your post and how teams evolve and grow throughout the season.
For instance, if I threw together 53 good late 20-somethings, they'd probably be lousy at first and steadily improve even if none of the individuals played above their usual level. New OL, new secondary, lots of turnover on the DL and at TE and RB, this team may have more cohesiveness than my hypothetical, but they are still figuring out what they have. This is even more exaggerated when we are talking about a Belichick coached team, with his September tinkering and reactions to swelling film supplies during the season.
I think this could have led to some interesting discussion if it had been framed differently. Can they improve? If so, how? Do they need to? How do they maintain this level of excellence throughout the season? Is there risk of other squads catching up to them?
^Those^ kinds of questions take the same topic down more interesting rabbit holes, IMO. In response, I might bring up things like the 2RB set, which I think could be a valuable ace that NE hasn't taken out of their sleeve yet. Or that, even if we presume that the PUP guys won't improve the team, they still protect the team from inevitable decline due to health issues.
I hope this idea gets a reboot because it has potential.