I personally do not see the WT changing their stance on extreme shunning. I wish I had more hope. The best that we all can do is make sure everybody within shouting distance realizes that they do it and the effects of it. There are TV shows/series about shunning in different religions and it hasn't changed their stance one bit.
I also think that those with a brain and a heart will change when they finally understand the cruelty and futility of the practice, and take a stand for their loved ones. Some though just don't have it in their hearts to be that kind of person, and will continue in their hate till their dying breath. So very sad.
I think individuals will make a difference. All Oompa wanted was to lead an authentic life and have his family. Sad how JW's think that's a bad thing.