Good question Prophecor. From personal experience I see that many who are no longer practicing Witness' do hang on to the core of the moral teachings. Despite their disbelief of it being the truth the morals that are taught come from the bible and are taught throughout most religions. However, I have seen a trend that effects most who leave and someone made a statement that made me think about it.
I am calm and relaxed in the world now.
What that translates into is that one becomes more LIKE THE WORLD, thus becoming more comfortable or relaxed to be part of and except it. Keep in mind that is just my opinion from observation.