Judging from last game (against the Warriors) our seats are empty this season again. And we have no crowd this year either. I swear the Nets never sell out off tickets for a game. And there is no noise in the building either.
Well, I don't live in the city. I live in Westchester County which is right above it. And I don't think that traffic is the issue. You just cross the George Washington Bridge and take the NJ Turnpike until you get to the sports complex. There's no traffic late at night.
I don't know anything about public transportation though. Sorry.