com.unity.shadergraph 3.0.0-preview Package Notes

Vector 1 nodes now evaluate correctly. (#334 and #337)
Properties can now be copied and pasted.
Pasting a property node into another graph will now convert it to a concrete node. (#300 and #307)
Nodes that are copied from one graph to another now spawn in the center of the current view. (#333)
When you edit sub graph paths, the search window no longer yields a null reference exception.
The blackboard is now within view when deserialized.
Your system locale can no longer cause incorrect commands due to full stops being converted to commas.
Deserialization of subgraphs now works correctly.
Sub graphs are now suffixed with (sub), so you can tell them apart from other nodes.
Boolean and Texture type properties now function correctly in sub-graphs.
The preview of a node does not obstruct the selection outliner anymore.
The Dielectric Specular node no longer resets its control values.
HD PBR subshader no longer duplicates surface description code into vertex shader.
You can now copy, paste, and duplicate sub-graph nodes with vector type input ports.
If the current render pipeline is not compatible, master nodes now display an error badge.
The preview shader now only considers the current render pipeline. Because of this there is less code to compile, and therefore the preview shader will compile faster.
When you rename a shader graph or sub shader graph locally on your disk, the title of the Shader Graph window, black board, and preview also updates.

com.unity.shadergraph 3.0.0-preview