Personally, I think it had to do more with fitting in with the team.
For Nolan, coaching here would mean coaching under a former employee.. in the world of egos and publicity, I can see Nolan avoiding that uncomfortable feeling of the roles reversed.
With Williams, whom really knows.. maybe the weather. Two equal jobs and probably pay.. one located in the far North, the other in the Far south.. for me, I hate hot sticky weather, so the choice would be simple. Whom knows with Gregg.
Or maybe it was the structure in Green Bay, MM is pretty strict in letting his assistants get much air time in front of the camera.. If Gregg has aspirations of being a HC again.. he needs to be seen as well.
Maybe it was the roster.. the Saints have a dynamic front four, but behind it, they need a makeover... maybe Gregg feels more comfortable in having a say in the players added to that mix.. more turnover in the roster and depth chart then here in Green Bay... we need an influx of talent in the box and need to max the potential of the players there.. but less of a hand will be given in adding players.
Then there is this.. Sanders had this defense playing decent ball in 07... so there are some expectations that the pieces and players are here.. With the Saints, they haven't had a great defense since the days of those excellent linebackers they had once upon a time spearheaded by Ricky Jackson.. so there is less expectations and he will look like a bigger hero in getting that unit turned around. Always helps if you want another shot at becoming a head coach again..
In the end.. both Nolan and Williams made a choice that works for them.. all my above is just guesses. That is all we have, unless we could sit down with them for a spell and have them
honestly tell us the reason behind the choice.
"The oranges are dry; the apples are mealy; and the papayas... I don't know what's going on with the papayas!"