In order for the Big Book to ever be changed, there would have to be a 2/3 majority vote of ALL AA groups in the United States and Canada. I believe that's it.
Then everyone would have to agree on what to change. That would take years.
Basically, how do you see your truth in reading the Big Book? When you drink, can you stop on your own? Can you see the unmanageability of your life? Those are questions to ask.
The chapter We Agnostics basically says, "Don't knock faith until you tried it." It makes clear the God is a God of your own understanding.