The strength of schedule was somewhat flawed in 2016, as the NFC East defenses performed better than expected. AFC South wasn't as bad as expected either. Teams in those divisions, and out of division teams playing those divisions had a much tougher schedule compared to the beginning of the year. Heading into 2017, this will often be the case again as free agency and draft picks can influence teams' defenses drastically. It can work the other way, as Atlanta had the second hardest schedule pre 2016, yet Carolina's defense wasn't up to par, nor was Green Bay's when they met later in the season.
Over the years the strength of schedule has generally churned out accurate predictions for how a team will do for the upcoming season. Travel schedules are taken into consideration, and Bye Weeks as well. The Colts last season played in London Week 4, but did not have their Bye Week until Week 10. Seattle's travel has always given them fits, and it resulted in poor numbers on the road. 2017 will bring more London games, and usually team's Bye Weeks will follow after. If anyone takes the route the Colts did after London games, downplay will occur.
The AFC West and NFC West have brought tough defenses to the table, resulting in tougher schedules for anyone residing in those divisions. Defensive divisions are ever changing, like the perceived tough defensive AFC North. Injuries and free agency signings change these divisions every year. The NFC North might be back to being a top defensive division shortly. Green Bay battled injuries last year, while Minnesota was a dominant defense for most of the season. Detroit and Chicago are not far away from top half defenses as well. Getting ahead of the curve with defensive performances is key to fantasy success.
