Thanks for the clarification. It should be possible now to reference a node by adding a polygon or polyline mesh inputs and then adding its transform component input. Though it will only work for geometry and shapes.
As for having controller inputs, can't you do that right now by, for example, adding a float input and then connecting/assigning a controller to it? You can then add time value component input so that you can reference the value at any time. You should also be able to do the same with vector3 inputs.
Marsel Khadiyev (Software Developer, EPHERE Inc.)