If we're picking people to draw out of their own conscience and experience a 'new' Constitution, we should not look principally for good lawyers. We should look to people who agree with us. When we are in that mode, you realize we have rendered the Constitution useless.
If you think aficionados of a living Constitution want to bring you flexibility, think again. You think the death penalty is a good idea? Persuade your fellow citizens to adopt it. You want a right to abortion? Persuade your fellow citizens and enact it. That's flexibility.
In a big family the first child is kind of like the first pancake. If it's not perfect, that's okay, there are a lot more coming along.