The "up to their necks in urine" comment was likely a specific description her parents made up. I've heard from lots of children raised as JW's whose parents described Armageddon with their own disturbing ideas, beyond those put in print by WTBTS. It's not unusual. That there were errors about witness terminology is beside the point. People not raised in it are trying to put things in terms outsiders will understand.
The society's refusal to change the 2 witness rule renders tiny adjustments to their policy mere lip service. They still refuse to report abuse in states where it is not mandatory. They still appoint predators to positions of trust as long as they are not "known predators", by which they mean known to the community or congregation. If ONLY elders and victims know, then they can and are still placed in trusted positions. If the organization wanted air time for the "positive changes" they've made, they could have participated in the documentary. The Australian Royal Commission examined internal documents and confronted them about the 1006 predators among 788 congregations that had never been reported to authorities. Their response, that they will never change the two witness rule, indicates they still have little interest in protecting children. Anything else is just shining the outside of a filthy cup.