Not outright , not instantaneously, but in a phased seamless way. A lot of the NE hubs are way too congested. This would make better use of the slots in NY. Better customer satisfaction. More creative routings from 2nd and 3rd tier airports to hubs, ease congestion. And if the operating cost of the C series, from what I have heard but dont know for sure is slightly more than the 200. Then it makes perfect sense.