First - PLEASE bring back some kind of number system like MR4, MR5, whatever...these credit names are too difficult to remember and differentiate.

Case in point, under Option 2 of the Environmentally Perferable Structure and Enclosure credit there are options for "Structure and Enclosure Product Attributes" including "recycled content". However if you read the text under "recycled content" is specifically states to use "non-structural materials with recycled content". I'll assume this is a typo or it will effectively eliminate recycled content materials from being used in the structural and enclosure assemblies in lieu of materials with other attributes.