Ummm...it goes back to what I stated before. Trains represent trains. The divisions cross. Issues on the Hoboken Division ultimately impact issues on the Newark Division and vice versa. North Jersey had terrible weather, particularly in the North West area of the state. This resulted in treacherous driving conditions due to closed roads, trees down, snow and ice accumulation. A lot of the Hoboken Division crew (which a great deal of the initial terminals being nestled in the mountainous regions) couldn't make it in a safe and timely fashion.
Now, years ago, the railroads would foresee these types of weather incidents and take steps to house their crews to make sure they show up. The railroads have scaled back these practices citing costs and not being responsible for where the employees live. The employees, citing safety and costs(e.g. is the cost of putting myself up in hotel greater than, equal to or less than what I will make braving the elements) often go home and hunker down without pay.
That means divisions aren't fed their trains, leading to a cascade effect. It is a different generation of workers. They favor quality of life over finances.