Maybe they could even improve the frequencies, or add a Beacon express that leaves GCT around 3:40. Right now train #841 (3:48 out of GCT) is over 100% capacity and carrying 800 people. #839 (3:18 out of GCT) is at 61% capacity between Cortlandt and Peekskill.
Same thing on the New Haven. #1542, 4:01p out of Grand Central is jammed, #1540, 3:30p semi-express out of Grand Central is pretty crowded as well. Same story on the LIRR. Meanwhile express trains at ~6:30p go out less than half full.
EDIT: I'm an idiot and forgot that a Yankee game (that I watched) ended literally 20 minutes before I started harping on MNR for not having enough pre-peak capacity.
TRAIN(geek) APPROACHING, PLEASE REMAIN BEHIND THE YELLOW LINE