mmm may I suggest a simple solution?
you guys could open an "how to" or "modding FAQ" or "whatever you want" forum, whenever a new feature is added the programmer should post his very first explanation here with a clear title. If someone has doubts about how to do a thing, it's faster to search a forum knowing what each thread will contain, and if the explanation isn't enough everybody will be able to reply on that thread and receive help about that specific issue from anyone in the community. Useless replies should be deleted and the result would be something like a FAQ, which could serve as a base to add things later in the wiki.
Probably it'd be more efficent if only moderators could open new threads, but you may consider to let everybody open new threads in order to cover every aspect of modding (althought those are probably enough documented already) plus the old features and not only the new scp features.