I couldn't be happier that IAD is out. I'm not a fan of that airport. Sad to see STX get dropped as I liked their connection over there more than the tiny Cape Air hops.
I do a lot of NY-DC travel and honestly, the Acela is easily the best way of doing it. Avoiding IAD/DCA/BWI along with delivering me about 10 minutes from my usual meetings in the same time frame? Yes, please.