Some saying Pakistan needs Islam. Which Islam? The Wahhabi Islam? The Deobandi Islam? The Al-Hadees Islam? The Bralve Islam? The Twelver Shia Islam? The Fiver Shia Islam? Ismailia? One of the various Sufi sects?
I can tell you right now, with how divided Pakistan is along sect lines, any group's interpretations being imposed will cause the others to fight back.
You have no idea what you're asking.
Also, secularism doesn't mean the absence of religion, or atheism. It's less French secularism thats being proposed, and more Canadian secularism Pakistan needs, where religious beliefs are respected and even celebrated, instead of being shunned and hidden away.
Pakistan is one of the few countries in the world that, while having a mandatory muslim identity, cannot choose to play favorites, thus a custom form of secularism is needed.