I'm sorry. I can understand how hard of a decision this is to make. It definitely is tough for T to change the way the game is played in a way that seems backwards and awkward. Sometimes it is necessary for them to do so depending on individual circumstances, to protect you or themselves...or both. It could be a situation that could be incredibly powerful and healing to push through but I know that is much easier said than done. It is important to really reflect on the situation, to make sure you are 100% certain of the intentions behind your decision before following through with it. If you feel it will be more damaging to stay with her, definitely move on and use everything she taught you...you can even look for a new T if you need one still. If you feel this is something you could adjust to and manage being uncomfortable for a while, during this transition, it may be best to stick it out with her.
I had a similar dynamic with my Therapist and we are still very connected and have a close, unique bond; but she had to change the boundaries because my needs have changed. I couldn't see it at first, but after some reflecting and asking her loads of questions, I completely understand her angle and agree it is necessary at this stage of my healing. It is an uphill battle for a while, I'm still working on accepting it. I still feel she is in my corner, one of my biggest allies, and a powerful advocate for my well-being...I still feel safe. And slowly I am beginning to feel peaceful.

I hope you are able to follow your heart and go with what you feel is the best possible decision.