Current builds of Dynamo have Wall and Floor creation nodes. However, the Revit API is a bit limited in the methods available with these nodes. You can create them, but you cannot modify them. This means that for most operations that you would do on them (moving them in most ways or adding/removing segments to floor outlines) Dynamo will delete and create new walls, which will in turn delete any hosted elements or annotations.
What do you think? Is it still worth having them as they are? Or is it dangerous to have them available in this way?