i think he knew it was going to hit the fan, so there was no reason to put up a fight when the offer was on the table to step down. the added benefit was that he (to some) comes out looking like less of a cause for the train wreck, since all of the departures have happened (publically) since he stepped down. nevermind that they were all but set in stone probably by the middle of conference play, they will be perceived as being due to stans being gone.
to take it a step further, i think this explains some of the difficulty we had in the hiring process. in the clarion ledger article, stricklin said that they've known for a while that the roster would be in this situation; i'm sure the coaches that were interviewed were made aware of this as well. i bethaving to tell them, "by the way, you'll be lucky if you have 6 returning players on scholarship, one player taller than 6'8", and no point guards," went over really well.