I haven't seen much commentary on what people think about the defense this year. I think it would be fair to say that most fans probably expected a rebuiding year when the season started. However, the defense has most likely failed to meet whatever limited expectations you had. I posted a poll to see what people think the problem is this year (coaching, talent, experience, injuries). Specifically if people think Dave Wommack is the problem or if they think there are mitigating circumstances for the defense's performance.
For me, the inexperience excuse goes out the window about midseason. Also, I have never heard so much talk about needing to simplify schemes. If players can't learn a scheme by the end of the season the problem is most likely with the teacher. Certainly there have been some injuries but the defense has been bad most of the year regardless.
When I look at the roster its hard to argue anyone had a good season except Derrick Morgan. Morgan Burnett didn't have the year a lot of people expected. Jefferson had his moments but was fairly inconsistent. Tarrant didn't have a pick all year and he and Butler played very soft coverage for the most part.
The Wommack era is very different from the days of Tenuta. Personally, I was ready for a change but now I am not sure what our overall strategy is. To my untrained eye we can't generate pressure and often are playing soft coverages on the corners. However, we also give up a lot of big plays and opposing teams consistently find wide open receivers.