I've probably landed on airlines @ DCA a couple of hundred times on all the runways, both in daylight and @ night, and as a Licensed Pilot ( Commercial/Instrument Rated/ SEL-MEL ) can second that all the approaches into DCA are tricky, most of all the approach to Runway 33, and Dangerous due to the heavy air traffic, Commercial,Military and Private!
Most of the blame for the current status of DCA can be placed @ the feet of Congress, and all the Recemt President's, for pushing for ever more flights into DCA,and failure to solve the Air Traffic Controller shortage that has existed since Regan fired so many Controllers back in the early 80s!
Pausing most of the Helicopter flights along the Potomac is a long overdue good thing.
The NTSB does a really good job of investigating air crashes, and makes solid recommendations for improvements that the FAA and the Politicians usually don't follow!
Let's hope that this disaster is a Wakeup call that we need to answer since most US Airports have similar or even worse situations that need fixing!
Off the Soapbox, the Ball is in Congress hands now!