It was my understanding that approval for the second runway was based on peak-time ops only where one runway would be dedicated to arrivals whilst the other dedicated to departures. The plan was 23L departures and 23R arrivals, alternatively 05L departures and 05R landings. Hence the new runway was built without a parallel taxiway and lower standard landing aids.
I agree that it is someway less than optimum use of a new expensive runway.