Hi Colin,
I have had that on my to-do list for a very long time. But you are exactly right. It’s always been a little too niche, so many other projects have taken priority.
Not saying that it’s not going to happen. I’m saying, I don’t know when that’s going to happen.
We did actually have a whole Grease Pencil course booked with an actual 2D artist last year but it didn’t eventuate 🙁
Some of the problems with teaching Grease Pencil is that the development happens so fast that it becomes obsolete so quickly.
(which is great for artists, not so great for teachers haha)