Phantom Driver:
RNav approaches? You have to be qualified. Were they? Also, not quite as easy as they sound; go from "VNav Pth" to "VNav Spd" on the approach and you are scrambling, unless fully briefed and prepared. ILS much easier.
Did you read the report? A big point was made of the fact they were trained, qualified and authorized RNAV, but didn't seem to grasp that fact very well. All this is in the report.
They flew the ILS to Runway 12. It was strongly suggested that the RNAV IAP to Runway 30 would have probably prevented the accident. No scrambling to set up for the RNAV to 30.