I couldn't agree more with you Geez, that a little bit of everything helps. I hate the way therapists think their approach is best. I personally. Think cbt works well for me but doesn't work so well for others. It depends on the client and their issues they present.
I am glad to hear that your attachment is fading from your t e and something tells me that if you are seeing another t, firstly you are growing and starting to take control of your life and secondly you are not getting something from current t.
It will take time to fully trust new t but from what you posted it sounded like an amazing first session and you have already bonded with her. I don't know much about IFS therapy but I think it is worth the risk to shop around for a new t now and again. Fresh eyes can see things old t didn't because they become accustomed to looking at us for so long.
good luck