I was thinking something similar just the other day. One thing I must say is that not only is Moving on mainly for SGA's, but it would absolutely blow alot of fresh-out exers away. Even Ex-Fam is too heavy for the beginning unless they have really been mistreated, but even then, I think "milk" to soothe their shattered nerves would be best.
When I first left, for example, and found NDN and read Inky's (Mordecai's) testimony, it suited me just fine. His "bath water not the baby" analogy was exactly the way I felt about things. I will add that as time went on, my viewpoint changed and things became more clear to me, but the initial "leaving" had been questioning my own sanity for awhile.
Your idea of having some clear guidelines is terrific. And I would add that it should be as unemotional as possible. I know that some may misunderstand me when I say that, but what I mean is that the FAQ's could be without the sarcasm or the exclamation marks.
I could not handle that at all when I first came to NDN. As I mentioned before, it wasn't till a year later that I felt things had calmed down enough that I could tremblingly insert my first cautious post.
If you need help with editing or whatever, I volunteer my services.