I am sure there are legal experts employed by Brooklyn who looking at how to minimise the WTS's exposure to litigation. I just don't think every organisation change has some ulterior motive designed to keep the GB away from court. You only have to look at the Candice Conti case to see how sucessful the WTS is at stringing the legal process out. I think the effort and money it takes to bring even a pretty rock solid case to court is a far larger barrier. I do accept that criminal culpabilty perhaps is different but even then prosecuting a perpetrator is far more easy for the legal system to follow than trying to bring criminal charges against those percieved as officers of an organisation.
I know we all like to think that the GB is an evil, machiavellian entity, morphed into the ultimate end of level boss but I am sure most of this comes down to saving money and being able to reduce resource requirements. I think the casual treatment of those who have dedicated decades of free labour is far more of a shocking reality than believing the GB are trying to distance themselves even further from the evil clutches of the public prosecutor.