Despite personal issues that kind of soured my mood overall, it was my first big anime convention, and the only big complaint that I want to address was the location.
I don't see how complicated for Anime Next to not stay at Secaucus. Personally where I am residing the transportation was a big inconvenience since taking two buses and a taxi ride was just awful. New Brunswick is not a convenient location to have a good way to get there by those relying on public transportation.
With Secaucus, I can say that it's better to remain there since all the trains arriving and departing go past Secaucus into New York. The NJ Coast train stops directly at Secaucus, the Rutherford train Station (where I used to formerly reside) stop at Secaucus as well
And I honestly wished there were shuttle services from New Brunswick. Call me petty, but it still is a long way to go even after you get off the train (or bus or both).