I spent some time touring Asti, Alba and Nizza Manfrotto in Piedmont in search of the OUV of this site, but it eluded me. I had previously visited the vinyards of St Emilion and Lavaux, both of which seemed outstanding. So I hope that the new WHSs of Champagne and Burgundy offer more in terms of OUV.
Producing good wine does not to my mind create OUV. We have superior wines produced in New Zealand, but I doubt that the vinyards here would claim any OUV.