As promised my report how the situation is now.:

There is no separate access to a domestic terminal area any more. Just the regular security screening and then everybody is channeled through the duty free area and ends up on the main concourse. It also menaa that you have access to the Primeclass Lounge when connecting to a domestic flights or travelling domestically. The "only international flights" small print by Priority Pass apparently was due to the former terminal set-up and has not been updated. Got into the lounge on a domestic connection without any problems.