Well.. if you think the Barricade® system you linked to supports your arguement, it falls way short. They claim 1% heat loss through the floor. Their product does not laminate two inches of XPS, not even one inch.

http://www.ovrx.com/subfloor-comparison.html

Don't get me started on engineers and marketeers. Maybe you could design something and then get Vince to pitch it for you. I hear he lost a lot of business after the hooker bit his lip.