I think the difficulty is that IFS works with "parts", psychodynamic therapy works with transference/counter transference, person centred therapy works with in congruence, CBT works with congnitive distortion a - basically there are so many different ways of understanding our emotions and psychological make up that being very wedded to any one thing can keep us very stuck. It seems that IFS makes sense to you in terms of how you experience yourself, based on your therapists explanation, which you believe. But what you experience can be explained in a dozen other ways, which may also be helpful now or at some other time - I think having a long term T schooled in one approach can be restrictive and unhelpful - it can equally provide a constant, secure space depending on the T and the relationship.

I guess what I'm thinking is if it works for you, ie you can see growth and change and aren't spending more time fixing problems in the relationship than actually working on the stuff that brought you there, then go for it. But if you feel stuck in the same loop over and over, it may be time for a break or a change.