Fred Jackson only clicked last week isn't that a pretty small sample to base that on?
Based on the weather and forecast I have a hard time believing it will give any defense the advantage. We aren't talking Oakland New England tuck rule weather. 60 degrees and light rain borderline slippery the offense definitely has the advantage. Defense is always reacting to the offense.
Crowd noise? The Saints play in a dome. It's an outdoor stadium. Won't be an issue.