I'm not nearly as critical of Lebeau as some and for those who wish he would leave, you'll one day get your wish and you might not be so happy with it.
PLENTY of defenses get exploited. It's a passing-offense-oriented league. The "great Rex Ryan" didn't fare so well against the Steelers yesterday. The "great Bill Belicheck" didn't fare so well the last 2 times he played the Giants in the Super Bowl - nor did he fare well against Kolb and the Cardinals yesterday. It happens.
That said, I will agree that we should be more agressive on defense. If we get torched being agressive, so be it. I loved watching the corners playing man coverage yesterday. They were ABUSING Sanstonio!! I don't even mind a few penalties in that situation. We were in Sanstonio's head all day yesterday and essentially took him out of the game. His ONLY "game" yesterday was to motion like he was throwing a flag.
Beautiful game plan all around yesterday. I can't imagine why anyone would be calling for any coach's head after that one.