I am so sorry about all you are going through. It sounds like you are making chinks i their defense. Do what you can to avoid regrets later on or they may haunt you the rest of your life. If you do what you can, you can always comfort yourself with the fact that you did your best.
from their perspective, i can see where they may feel justified more in shunning you if you committed adultery and did not repent. You are clear of that now, but you are still dealing with fall out of being DF for it and not some lesser issue. The CO and assembly parts make it clear how deranged all who leave and never come back must be in their hearts....diseased of sort that is like a virus. No doubt the atheist stand has put them on alert.
Perhaps softening your stance to at least agnostic.....unsure could help. If your stand is your are repentant for adultery and are really studying to be sure but feel uncomfortable with doctrinal changes and unbiblical policies, then you bring their initial line of defense down somewhat. They may be more open to contemplate how to help you and consider those issues more closely as well in effort to help you.
just a thought. It sounds like they love you very much and are trying to be good JWs and follow "Jah's" direction so all will be "blessed and not blood guilty. There is so much pressure these days....it is the statements from platform that really disturbed me enough to go looking on internet more.
Peace to you