If you are the center one...and excuse me as I know nothing about your diagnosis Alexandra... will you not eventually need to stop pushing this back? Does that have anything to do with how you feel right now?

W is the knowledgable one of your diagnosis and able to deal with it. W will hopefully help you find the way that you would like to move forward to integration if that is what you wish. Do all of your alters wish to be integrated or are they able to answer that? You are wishing to do this your way or possibly W's way. How is T not accepting W? Is it a matter of W's paper and what it shares that is not agreed with?

Is t not willing to try things your way and why not?

My t keeps talking of developing a unconscious alliance with him. I am not sure if you to even the conscious allilance yet. I am finding that my alliance is being found by putting what each of us are thinking right out there. Not easy but either progressive or not.
It sounds like you are working toward the treatment but the alliance is now at risk or currently not solid. Perhaps this needs to be addressed?

Just a thought. Hope I am somewhat helpful.