The arrival of the Long Island Rail Road’s newest train has been quickly followed by commuter complaints, ranging from a lack of Wi-Fi, insufficient leg room at some seats, and the peculiar location of one of the trains’ most anticipated features — electrical outlets. “As soon as we saw it, we said that was not functional. You’re either going to have the people who are sitting in the windows using both of them, or someone wanting to stretch their wires from the outside across someone’s lap, which no one’s going to want,”