When is a new and mostly complete HELP supposed to come out with the breakdown of the raw commands ?
When Jon finishes writing it, which he's doing now (in between other work as it appears).
Most of the are as they were in Opus 9, so the Opus 9 manual can still be used; it'll just be missing a few new command arguments. (The most important/useful new arguments are mentioned in the What's New PDF, too.)