Scatter and transparency are not the same thing. Random Walk is a better scatter method than Burley for removing the "blueing" in manifold meshes. Burley for non-manifold and nothing will provide scatter in 2D geometry. You need thickness to scatter in. Changing the Scatter_Groups also helps to reduce that in SSS shaders next to each other. If the Devs have your issue then you are in good hands. I don't understand your response as in relation to the question asked.