Hi Dig,
The point is the process.
If a user can recover the key to their own device, no problem so long as their identity can be authenticated.
If a third party such as law enforcement can get a subpoena to access your device, that is permissible under probable cause and practical due to the key archive. That is targeted surveillance and I thing that is a balanced approach between the needs of security and privacy.
If a third party such as NSA can grab the key archive then it can continuously access your machine, store its content and communications and clearly associate the use of the machine with the user. SOD seems to have been set up to share data between interested government folks in acronym city such as DEA, FBI, CIA, IRS etc. That is something new and unpleasant. Non-terrorist, non-criminal individuals have legitimate secrets from the government.
TCG was originally sold on the concept there is no government back door. That looks increasingly nonsensical.