So anger and frustration out of the blue may be a good thing?
Not trying to read her mind, but yes, IMHO, her overt signs of anger & frustrations, moodiness, sadness, and other emotions, usually means that her previous plans of getting a D and starting over.......well....it isn't going like she thought it would. She is beginning to see the man she fell in love with and it stirs up feelings that she was certain was dead. She doesn't want all of that to happen b/c it goes against her well-thought-out plans.
So, bear that in mind whenever she shows these signs and you have no clue "why or where" it came from. Take it as a positive step toward progress....
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!