Coronado is boring and empty system. The problem with Coronado is that it has nothing that reminds you of vanilla. That is bad, as it will make noobs feel like they aren't playing Freelancer. In fact, they will see the horrible BSG imports first. Is that really what you want to impress newbies with?
Pennsylvania has everything it needs. It has a beautiful starsphere, a nice set of planets, a good lane connection, unlawful bases, a mining area, people feel like they are playing an evolved mod, not some random mod or plain vanilla. They get greeted by Gettysberg and Hamilton, move over to Bethlehem and Philadelphia with are all nicely designed stations that don't stand alone in space and then move to New York, see the stuff they know and are like "Okay, I saw penny. Let's see what else is new to this mod!".