all will be well, and here is why: PS can never ever provide full documentation itself. It can do a better job on it, but never holistically beyond explaning what each node parameter stands for and what effect it has.
So in my mind, the documentation of the nodes is going to be a reference, not more.
But that is not a problem, because more and more tutorals that come along will help with practical use cases, so that users will be able to really becom more proficient in using Tg2. In the end, the wiki will play a key role, with its user contributed know how.
I also believe that the time has come for more video tutorials. I'm sure it will happen.
Cheers,
Frank