I believe the following trains originate or terminate in Croxton. This is from parailfan.com
20E, 20K, 20W, 211, 212, 213, 21M, 23Z, 24Z. I'm not sure if 290 still runs or not.
I'm not surprised most of the international traffic is originating/terminating at port or E-rail now. It's got to save a lot of money over local truck drayage. Unfortunately NS still lags far behind in that area to both CSX and the highways in NJ. It does not look like ExpressRail and the Bergen Tunnel clearances are having the desired effect that most people were hoping it would... at least not right now. As far as I know, the only real trains NS has with mostly international traffic are 22V/25V and 23M.
Imagine what things would be like on the Lehigh Line if NS didn't have the JB Hunt contract.......
I think it may be possible that NJ Transit might not be the perfect, infallible organization that most people assume it is.