It is true that Jehovah's Witnesses put disfellowshipping offenses in degrees. And apostasy ranks the highest. Some years ago a group of friends, all who had been disfellowshipped, met together. One woman who had been df'd for "adultery" seriously said to the rest of us that we were far worse off than she because we had been df'd for "apostasy." I thought to myself this woman is going to return to the organization one day. And sure enough, a few years later we heard she had done just that.
The rest of us who were there had made a conscious decision that the Watchtower Society was not God's organization. We were not Christian apostates as each of us still maintained our Christ faith in God and Christ. We were only Watchtower "apostates" because we rejected the Watchtower claim of being "God's organization." She, on the other hand, had morally violated a Christian principle.
It was always significant to me that she alone among us returned to the Watchtower. The rest of us had rejected the Watchtower precisely because we saw that it was not a christian organization. All of us wear our badge of "Watchtower Apostates" with pride. It means that we made our decisions based on sound Christian principles that allowed us to choose Christ over a human organization.