This credit is a very good addition. A lot of LEED projects today aren't doing these types of studies and they are very valuable.

Consider associating a time frame for this credit. Big picture scenarios should be performed during conceptual (e.g. massing, orientation, etc.), parametric simulations (e.g. insulation, glazing, etc.) are best performed in schematic design phases of a project. It should be presented that not all of these simulations have to be done at one time, but where it best fits the project.

Consider clearer definition of what is intended by two scenarios. That doesn't allow for much discovery.