First off I would like to point out the bar has not been set very high. In four years Gus Bradley failed to break five wins in each of those seasons. However there are signs that Marrone can help the Jags win more headed into the 2017 season.
One benefit Marrone has headed into his first full season as head coach is disruptive defense. The Jags seemed to find a groove under Todd Wash late in the season. Defensive rookies Jalen Ramsey and Yannick Ngakoue were a big part of that. Headed into their first full offseason Ramsey and Ngakoue will only be getting better.