Interesting, thank you for the info!
Sounds like while possible, it is not really practical which is a real shame. Sounds like the only real use case would be for much older (DRM free) titles that we not be updated but even then those titles are usually so small you're better off keeping them local and save the hassle of conflicting/overridden config files.
Perhaps going with the cache system I saw would be better so at least I can save on download times