Rope swinging, and sliding do not have the best tutorials on Youtube. Most rope swings are grapples.
We also dont have a lot of good Particle effect attacks, or animation blending tutorials. Especially for getting jump spot on, Jump to Falling/float, stepping off ledge not activate jump anim, jump to ground pound etc. A lot of people have issues with it. Especially bone blends, and transitions.
Then there are environmental issues with lighting, and tips and tricks.
One thing I also don’t see enough of is compiling projects, and building to devices to test workflows.