I would like to see a series of detailed plans that show, for example, the R Value of the insulation, especially with the broad window exposure, the kWh capacity of the panels, the storage capacity, and more.
You can see most of the construction documents on the Solar Decathlon site. They have to be published as part of the competition rules.
Also, it needs upscaling for real-world families. For a young couple with no kids and both working outside the home, who only need a place to sleep, it appears ideal. That ain't me or my family. Where's my office for my writing and programming? What would be the impact on the energy system of the five computers I use constantly, or the ones others in my family use? Where's my media room, the big screen for my movie enjoyment?
Where are the bedrooms for my kids and grandkids when they visit?
As part of the competition, they needed to specify who their target market is and they are limited to 1000 square feet no matter what they choose, so the house will be on the small side for a family.
PV Water heat sounds nice, but for how much water? How does it handle a real winter? Is there propane backup for winter use?
Still, there are some good ideas here. Maybe When I build the next house, I will use some of them.
That is the real purpose of the Solar Decathlon - to get people to think about energy usage and to spur development of better clean energy technology.