It is generally accepted that ICAO Specifications for signage fall short of what is needed at most modern airports nowadays.
Paris CDG have had to improve substantially in what they had originally when running pairs or parallel runways with one remote from the terminal, just in order to reduce the substantial number of runway incursions they were experiencing.
Dublin has also had significant problems, but Aer Rianta refused to see the problem for quite some time until various airport users, Aer Lingus included, as well as the IAA had a major go at them.
It is no longer sufficient for an airport to state that they conform to ICAO specifications. They must also demonstrate a proactive approach to safety in their operations and infrastructure. If they actually fall short of ICAO specs, then their licence should be suspended.