This could turn out to be great news. I'm no expert but aren't all Congregations, charities in their own rights and the local elders, aren't they trustees? I was under the impression that trustees were personally liable for example if the charity ended up with a big bill they couldn't pay etc.
If someone tries to sue the WT and fails because they have wriggled out by making 'Jehovah's Witnesses' responsible, the local elders will sooner or later be the targets. When that happens we will see genuine changes in policy, practice and procedure which will result in adequate protection for vulnerable members. Either that or a raft of elder resignations. Win/win.