Re: Changing the coach
He served much in the duo-Kirilenko Petrova.
He helped petrova for the Olympics and that she was the main objective of the previous year, so she joined Kirilenko. By winning so many games and major titles, it made that singles made improved since their confidence was another.
So I think Bine must set clear goals and learn from this experience, this may mean a change for her and I do not think it change of one day to another, but if you can go slowly gaining confidence that is what she need to recover and find tranquility in their matches thus she can go back to feel better in a court enjoying.