May I ask you, maybe you can suggest a temporary fix, a MEL/Python command that will unlock these attributes? I assume they work but are locked in Maya interface?
Please download AEmaxwellLayeredMaterialTemplate.mel from here and place it in the Maya AE scripts directory, overwriting the existing version. On Windows, the path is c:\Program Files\Autodesk\Maya2016\scripts\AETemplates, while on OSX it's /Users/Shared/Autodesk/maya/2016/scripts. (Change the version number in the path if you're using an earlier version). You will need to restart Maya after this, and the problem should be fixed.