You will never overcome your witness past
Hmmm, i'm not sure about this. I think you can overcome your witness past, but of course it takes strength, determination and a certain resolve to move forward and make a fresh start.
But you will always have at your core a view of the world that the Witnesses gave you
You may have their teachings in your head for a while, but the longer you've been out of the org the more you realise what they taught you was a load of shit. After you have left and start to live a normal life, you begin to realise the very manipulative, obsessive, paranoid and sometimes childish methods that the WTBTS used on you. You then realise that they use such methods in a desperate attempt to keep all of its members under control and held captive.
The worst thing that could affect you for a long time after, is that if you still have family members in the cult who shun you (on the instructions of the org) after you have left. If this happened to me, i imagine this would be truly painful and i certainly wouldn't wish this on anyone else and i feel for anyone who has had it done to them.
I agree that apostasy certainly does help you after your exit, and websites like this do make a good contribution to your recovery, but i dont think apostasy on its own it is the sole cure of overcoming your 'Witness' past.
Good post though!