The damage the Oxygen special and the media coverage in People and other places really is among potential recruits. I'm sure some curious PIMIs will watch it and be shocked. Some will say it's just lies but that documentary was so well done that even those who say they don't believe the victims really know that they are telling the truth. The knowledge that the organization put its reputation over the safety of kids will wear on them but the cult programming is also strong.
Those on the fence about whether to investigate their doubts might be moved to do so. You never know what gets people ready to take an honest look at the organization.
But, the hit JWs have been taking in the court of public opinion is shifting from just a nice but annoying religion who knocks at your door to a pedo hiding organization. And that will diminish their already abysmal results in the US and other Western countries to gain recruits.
I don't think the US (since that's where I live) government should destroy any religion or private club, but they most definitely should ensure everyone follows the rules. The PA investigation should be interesting.
Ultimately, I think the JWs (like other fringe religions before them) will fade into obscurity but will be here long after I'm dead and gone.