I seriously doubt there is commercial potential for the pier.
A) The Port of New York and New Jersey can already handle Panamax/the largest ships that are out there today, and has much better infrastructure for dealing with transloading goods in and out of the port.
B) The 'fingers' of it go pretty far out in the bay, which is good for larger marine traffic. However, those "fingers" are pretty narrow, I'm not sure they can handle anything besides the rails and some light equipment being placed on them.
C) IIRC there are no cranes on the docks. Going off of B, I'm not sure if the necessary cranes to unload and load ships would be possible to place - Navy ships IIRC have their own crane/loading systems to put material from Earle onboard.
D) There are quite a lot of US Navy ships that utilize Earle's finger docks frequently. I do not think the DoD would want ships flagged under foreign nations, served by foreign nationals who may or may not be from hostile nations (Think China, Russia, etc) being close to state-of-the-art naval vessels... It would take a long time to unload commerical ships on Earle's docks (if even possible) so that allows for a malicious crew to take photos etc. of any Navy ships nearby.