I love IFS!!!! I didn't like CBT at all, but my DBT group has been great. You have to make your own decision, but IFS is a very gentle, freeing kind of therapy. Can you try it and see how you like it, and the T, but leave the door open with your current T?
I also find it confusing when Ts think their methods are the best way. My T believes in IFS, EMDR, and SE but she thinks DBT is good for me too. Years ago, I saw a CBT T. I think what matters is whether the type of therapy and the T are a good fit for you.
Good luck!!

