It looks OK with creased edges. If the heightmap has too many small details good results can only be achieved with high resolutions which slows down Blender and makes working with it pretty hard.

Theoretically yes, but you have to modify the node setup yourself. The Nodes are grouped and named so it's pretty obvious what they do. I haven't been able to come up with a system that would work for every customer. Depending on the demand, feature requests and suggestions more features will be added.

Feel free to contact me.