This defense will be what it is, there is not much any coach could do with it. They suck against the run and the pass. What do you do?
Honestly it's hard to tell anything definitive during preseason one way or the other.
Things I've seen:
-the tackling overall has improved
-our d-line get's a consentent pass rush that is lacking from our linebackers
-we're good against traditional running plays, but get killed with zone rushing schemes
-we've limited big passing plays and yards after the catch
The Texans offense is hard to stop because a) they run the ball extremely well and b) because they run it so well, the bootlegs are hard to defend because the team has to respect the run.
We still have a ways to go, but we might be able to scrap something out this year.