JV,
I've been thinking about what you've said on the possible restructuring. What it sounds like is similar to the way the Baptists are structured, with each congregation being autonomous. That has served them well in terms of not exposing the "mother" organization to lawsuits but they give up a lot of control.
I'm sure the WT Legal department would love to move in that direction and may even be recommending that course of action. But I just can't see them giving up that kind of control. Even if you make the local congregations their own legal entity (as is the case with many congregations in the US), the agency relationship would still apply if the WTS is still controling and directing management.
Maybe I'm wrong here but I think they'd really have to give up control to break the agency relationship.