I think this is a very interesting discussion. I left Pakistan long time back and after living in Japan and Singapore made Australia my home. In all these countries I have never felt that I was not welcome or was being discriminated. I have full freedom of movement to any part of the country, access to every benefit that I enjoy as a citizen, have the right to speak and express my opinion without fear of being persecuted, have total peace of mind regarding my safety, I have a sense of security and justice. All of these virtues are not due to the government but by the society and people around me. They are tolerant and accepting.
Unfortunately in Pakistan the society has not developed enough to this level. Pakistanis are an intolerant nation by nature. Eve if there is the best and most honest government at the top the people and society remains the same. People are discriminated on the basis of gender, religion, belief, ethnicity and cultural back ground. A sindhi income tax officer can never work in Bannu or a Pathan administrator can never work in the municipal office in Chandka. The huge class system of haves and have nots is dividing the society right in the middle.
For these reasons, even if the best government comes into power, I would never even think of going back. You become what your surroundings are. Where ever you belong becomes your home. Even after 100 years if Pakistan progresses to where Australia is now, Australia would have progressed even further.