Yes, I will preface this thread with the same thought we should all have in these games going on right now...it's preseason. There, that's out of the way now.
The starters on defense had some big plays obviously, but man that 3rd down problem that has plagued this unit in the past showed itself again last night. Time after time they had Matt Ryan and the Falcons in a 3rd down situation and couldn't get off the field. I can recall off the top of my head several 3rd and longs where the secondary let White or Jones find a soft spot in the middle, or got caught playing too far off on the sidelines and Ryan found them for big gains to move the chains.
Keep in mind also that there were many different faces at cornerback tonight as the coaches try to find their starting group for opening weekend. McFadden didn't play again tonight either. Regardless, both Tomlin and Harrison said in the post game pressers that they were not happy with the defense especially on 3rd down.