This must be one heck of a large update to take this long, I can't wait . Any chance questing will make its way in or is that in the far future?
Any of the API that is missing docs will eventually have them added. That's just basically a task of going through all the code and adding it, which will be done, just not a super high priority for now. It's a massive update, and still has a ways to go. Questing support has been added via the API, see this post for some info on what it looks like, and the plan is to eventually add support for doing all the quests. However, an actual complete quest bot won't be done right away, since there's a ton of quest states to handle to be able to correctly do what is needed, on top of needing better non-questing functionality for exploration and combat. It'll probably start out with some simple Act 1 stuff, and then be expanded through the other Acts. The logic needed for boss farming is actually useful for questing as well, so we'll be able to handle both with the same code if all works out as expected.
