A lot of the options are probably gonna be unveiled in the full APG, since Oracle only has 3 Mysteries and there's a lot more than can be applied to them.
I can only imagine how many of those archetypes will be class archetypes and allow for more subclasses to be explored.
I hope so too, with the bonus to athletic checks to swim and all, because the witch should absolutely be able to say that they weigh the same as a duck.