In the 3-4 defense you need lineman who can tie up blockers and get after the quarterback in the pass rush. Right now all we have is one linemen who can do both, seth payne is still working his way back, and gary walker hasn't played well at all.
Also the O-line is going to improve and theirs no way the texans draft a o-linemen in the first two rounds. wand and pitts are both young and inexperienced at their positions.
In the draft were either going DL in round one or Secondary help.