I hear what you are saying. The have vastly improved their offense since the second half of the Tampa game. They are letting Josh cook with his legs, improved run scheme leading to better running, more RPOs and motion, added McKenzie back to the offense, and most importantly a much better Oline which is giving Allen more time and opening holes in the run game. I'm not overly concerned with the turnovers. I don't really think it's a huge issue.
Defensively is more of a concern. Run stop vs a top notch runner with a good QB will be a challenge. The pass rush is slightly improved but still inconsistent and not sure how reliable it is. The pass defense is decent but not the same without lock down Tre. He will be greatly missed in the playoffs.
I can see the Bill's losing in the first round or making a super bowl appearance for the AFC. The conference seems pretty wide open. What is encouraging is the Bill's have an elite QB who can lead and carry this team very far. Lastly, this isn't uncharted territory for the Bill's. The moment shouldn't be overwhelming.
Go Bills!