The Seattle Seahawks defense has struggled, to say the least. Some of it has been minor to serious injuries at all three levels from defensive line to secondary, a lot of it has just been very underwhelming play for essentially the third straight season.
One of the obvious things that has to be corrected after the bye week is their own ability to get off the field. Last year they ranked 31st in punts/drive, and this year they are dead last. Less than 20% of all drives they have faced this season have ended in a punt, while everything else has ended in a score, turnover on downs, or an actual turnover.