Dynamo already provides nodes out of the box that can fetch the active view. Unfortunately they are not yet able to display some of Revit’s view types. Some of the views that the built-in solution can not currently handle are:

• Sheet views
• The Project Browser (yes it’s a view)
• Legend views
• Keynote legend views
• Schedule views
• Structural plan views (added in version 0.9)

“Active View” is a temporary solution to solve that problem. Once support is added for all view types, this node will be depreciated from the package.