I'm sorry, I don't see it. Brutal schedule? You'd take 12-4 with a tie-breaker advantage over Indy? With this Patriots team?
Your expectations for the regular season are way too low. 12-4 may have been on the low side of acceptable expectations before the season started, but after playing 3 games, not having any major injuries and seeing exactly how well the new pieces have been molded into the team on both offense and defense, how can you reasonably believe that the Patriots would lose 5 out of their remaining 13 games this year? And if not, then why would you be happy with 12-4?
We don't know how the Patriots will be playing in 8 weeks - which can be a lifetime in the NFL. However, all indications are that the Patriots are scary good and a 14-2 record is not a dream, but a likelihood. I think I predicted before the season that they'd go 13-3 and, after this start, I expect 14-2 is more likely.
16-0 is still very low probability ( <5% IMO ) but it could happen. In what game will the opponent be favored over the Patriots? Maybe the Colts, but even that is doubtful. The Patriots just have to play to their ability and get lucky (with the bounce of the football and avoiding major injuries) in order to dominate the NFL this year. Here's hoping.