That would not work even by a longshot. The train is only there to pick up any passengers left behind by the train, the train can be at any place at any time (they could only afford to run the Dyre Avenue at night), the Pelham Bay Park Express is there for faster service to Pelham Bay Park starting from East 177 Street (there is a reason why the Express was expanded to a weekday peak operation), the Flushing Express does not need to be reduced even further, while the only way that the train can even go to Second Avenue is if it had a weekend schedule (it currently does not have one).