I would also welcome a tutorial. I am using WH since 2 years now, and I appreciate how simple it is to use. But WH has a lot of "advanced" features that are hard to detect, which is a pity; you must have spent much effort to implement them. If these functions / features were mentioned "somewhere", I would learn about their existence, and could consider them to optimize my workflow.
For example, I am on iPhone, and I was not aware of the functions in the context menu, like splitting a work unit; I learnt about them only when I read every single discussion in this forum.
So for me, what is missing in the FAQ:
A short overview over the available features, and where to find them. It doesn't need to be a full-fleshed / detailed tutorial; another FAQ entry would just be fine; especially as you are available for any further questions (a big praise also for that!)