Talent wise the o-line has enough to get to the playoffs. The problem is the diva at left tackle whose holdout and the subsequent shuffling of the line, prevented the line to develop the chemistry needed to be consistent.
As far as D-line, Stroud was a huge upgrade on the interior, but Schobel's injury and Kelsay's mediocre play hurt the team's ability to rush the passer big time. That and playing our safeties deep and not blitzing enough, led to painful, prolonged drives which drove a stake through this team's chances of winning.
Bottom line is that the talent is there on the o-line and a different defensive scheme to suit the players we have could have led to this team getting to the playoffs.