Dolphins retooled their offensive line in the offseason, leading many to expect bigger and better things from the team It's the team's defense and wide receivers that are a concern now.
Tannehill enters Year 3 with pressure to start winning ballgames, but the talent around him doesn't impress Mike Wallace may be the NFL's most overrated (and overpaid) player, while Brian Hartline is solid but won't scare anyone. Rookie Jarvis Landry may have the best hands on the team, but first-year wide receivers rarely produce leading numbers.
Tannehill may be held back (again) by the talent around him.
On defense, the front four will once again be very good, but at linebacker there are concerns now that Koa Misi is in at middle linebacker and Philip Wheeler is still starting on the weak side. It may not be long before Jordan Tripp is in the lineup for good.
The secondary play is good and has potential to be even better with Jamar Taylor and Walt Aikens in the mix, but the Dolphins aren't yet good enough to overcome New England in the AFC East.