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.
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.