End-point to end-point? Yes, of course. Probably Toronto to NYC through ridership would be a little higher if the Maple Leaf operated on a night schedule as, according to Google Flights, the first Air Canada plane lands in Newark at 10.15. Skipping to a night service would also potentially shave off some of the travel time, as some intermediate stations could be dispensed with, up to the point that the service could save the 2-hour border-checks in Niagara Falls with border preclearance done in Toronto (and no intermediate Canadian stops all the way to Buffalo). After all, the Empire Corridor is already well served, with 4 services already originating in Buffalo and 20 from Albany (in both cases, not including the Maple Leaf).