I think, speaking from the legal aspect, you need to now worry about the paperwork. I mean, I do agree you need to see and speak to your children, and you need to have paperwork in place to protect yourself financially if that is an issue.
However, whether or not she files for divorce cannot be an issue at this time. It is only a piece of paper. If she files, it can be dismissed. If it is finalized and you reconcile, you can always remarry.
My friend, patience is a virtue. This is not something that is going to be solved quickly, and putting a time frame on it for her can be viewed as controlling behavior by her. Getting the bishop to talk to her, IMHO, is a little sneaky and underhanded. Don't get anyone else to do your dirty work.
Go back and read her email again. Regardless of what she has said, and if it is true or not, this is how SHE perceives it. Listen to her. Validate her. Don't make promises because she really doesn't want to hear them right now. Don't tell her what you are doing differently. Wait and see if she notices.
If you come on too strong, you will push her into a corner and she will fight that much harder to get away from you. If she wants a divorce, that is what she wants, and you have to acknowledge that. If you disagree, KEEP IT TO YOURSELF. She does not want the argument right now. Don't bring it up. If she does, listen, and validate. Nothing else. Don't try to talk her out of it. Two words "I understand." period.
Im still standin better than I ever did looking like a true survivor feeling like a little kid Im still standin after all this time and Im picking up the pieces of my life without you on my mind..