1-) Have a look at the example file below.
* Open the file.
* Double click on the "Planet 02" node.
* Right click on the "+" icon in the right side of the "surface shader" below and go to "Assign Shader".
* When you want to use then the "Power fractal shader v3 01" node nothing happens.
You can only assign this node, that is outside of the planet node,
when you delete the node with the same name in the planet node network itself.
First time i see the new naming shame to be kind of a problem.
2-) Go to the "Water shader 02" node and double click to open it.
When you try to change any settings you won't see the changes in the render preview or render.
If you pay attention it is easy to see why (the node isn't enabled and does have a different name) but it can be confusing.
There is actually a disabled "Water shader 01" node exactly over the "Water shader 02".
When you left click on the "Water shader 02" and drag it you can see that you actually clicked on a disabled "Water shader 01"node.
How it happened i don't know, but took me 5 minutes to understand why it didn't work.