It doesn't do any good to try to analyze your spouse's behavior right now...I've learned from my personal experience that will just end up making you feel crazy and out of control. It may be a good thing that she chose to cancel her FB account. That will cut out a lot of opportunities for connecting with other people who may not be supportive of your marriage. I think "simplifying life" sounds like a positive thing. You said you wouldn't give up until the last paper is signed and that you will do anything to save your marriage and make amends with your wife. Prove this now, not with your words but with your actions.
While I don't know much about your situation other than what you have posted, from a woman's point of view, I don't think your wife is completely "done" yet. Hang in there.