Expanded Blending Modes for Material Blend Node

Thank you, Dave. It helped a lot. I didn't know about Ctrl+E.

You're request is a sensible idea.
While it is considered by Adobe, you could in the meantime open the reference for the material blend node (Ctrl+E) then save a copy of the node with a new name such as Material_Blend_Copy.
Then open that copy which should now be editable, modify the input parameters to add the additional blend nodes that appear in the standard blend node. These must be in the same order as the standard blend node. Then save the modified node and use it in your graph (just drag it in).

Dave 

Forgot to mention, I would like to suggest to add Normal Combine node functionality to the Material Blend node. This way we'll be able to use Material Blend node in a much wider range of scenarions in comparison to what we have.