It should be every country in EU and those looking to join to have certificates on their id cards. Am thinking they are just trying to expedite the process. EU could easily create their own regulatory body and get approved by other root certificate holders to establish path of trust, but most likely it complicates things and/or takes too long.

Not to sound too pessimistic but making a browser trust another certificate is not that difficult. If they wanted to MITM attack anyone it would be fairly easy given that people usually install software from any source let alone government without thinking twice. During that installation another certificate can be added to the list of trusted roots and problem solved. It wouldn’t be harder to achieve and it would be much harder to detect.