My Opinion, AA/NA are spirituality based and not religeous based. You hear God mentioned quite often but almost always as a 'God of your understanding'. I've heard God described as Good Orderly Direction. Faith based - sure I have faith that good orderly direction can take me down the path to true serenity and happiness.
As far as corny sayings go. Sure there's lots that can be coined as being corny, but every one of them have meaning well beyond the corny aspect. KISS - Keep it simple stupid. I'm somewhat of an intellectual. Most of us alkies are very very smart, or we wouldn't have survived. Most us us tend to take something that's very simple and complicate the heck out of it, so someone in the distant past came up with the saying KISS - telling me to back off on complicating things and take it step by step.
Corny sayings abound - but then I don't believe that's strictly within AA or NA.