Reading this thread is also a lesson in the stupidity of over analyzing a preseason game. Jut look at everyone complaining about how our DEs suck.
I think some of that stems from a simple misunderstanding of the D-line.
The best DE's in the world are going to look rather mediocre if they are not paired with good DTs. There are a variety of reasons for this. The most obvious being blocking assignments. If the lineman are able to block the DTs without using a double team, this increases the emphasis on blocking the DEs (especially bull-rushing DEs) Also, if the QB has a well developed pocket to sit in due to lack of interior push, it can appear that the DEs are just not applying any pressure at all.
*This is just another reason to be really excited about our defense this season!!!