Sorry to hear it has come to this. Perhaps there was no other way and any other path would have lead to this same point. But I would have given counseling a hard try. Even though you are divorcing, there is no assurance this will cause her to understand the issues that are driving her and therefore try to learn, grow, and reconcile. I think counseling is the best shot at attaining this knowledge and only wish you had tried that route first. In my mind, D is always the last option and often one that you can never take back.
I hope she is sincere in her latest plea to you, but then why, or how, could she be? What has she learned about herself, other than the fact that you have power and are willing and able to wield it? Maybe her plea is not sincere at all and just a new twist in her bag of tricks or a way to buy time? Either way, what bothers me is that underneath all this, I sense you are still hoping she will change and that this motion for D is just a way to manipulate her into doing what you want.
Don’t get me wrong, because I have always preached that a person should make things uncomfortable for the withholding spouse, to move things off center and “force” growth to a higher level. But I don’t think it wise to push so hard as to loose sight of the objective and instead cause the spouse to harden even more. That’s the thing with wielding power. It is so easy to exert too much. But you’re on your path, so good luck and I hope things turn around with your wife.