This post set me to looking at a passage that in the past the borg used to use as a sort of scriptural precedent for giving permission to some sister to leave her husband. It is/was 1 Cor. 7:13, the part that says that if he is agreeable to dwelling with her, she should not leave him. What the borg did was sort of reverse the passage and say that if the man was not "agreeable to dwelling with her" by his conduct, she can leave. They especially interpreted this as applying to "apostates." They reasoned that if a man had become so spiritually threatening to her (you know, by attempting to share things like TTATT!), he was by his conduct not "agreeable to dwelling" with her, and for her own spiritual safety, and, of course under the elders' direction, she should leave him. As I recall, they also applied this passage to "extreme" physical abuse.
Now I don't know how public this all was. It may have been only in the elder's book or in KM school, etc. I just don't remember.
Anyway, the revised NWT now says "agreeable to staying," so who knows what motivated that? Maybe they're trying to extend the above application somehow??