I would tend to agree with this. The defense is playing really, really well. But we spend an awful lot of time dropping 8 and having our front 3 get absolutely no pressure. I think it also leaves us very susceptible to the QB scramble, as we saw.
We get no pressure, force few mistakes, and have given up way too many (backbreaking) third and longs from scrambles or giving QBs 7+ seconds to sit in the pocket. Just because the unit is good doesn't mean there aren't areas that could see improvement.