You raise great points. I think that generally speaking (like the current system) if you can look at a plan visually in radar and it’s within your air space 9 times out of 10 it is inbound to your airport.
I like your point because this it raises the situation with KEWR and JFK. here you have two well respected International Aiports. However I feel that for air ports with this type of situation there is still a solution. What if in cases like this the server could force you over to the correct channel as filed in your flight plan provided you filed it. Like some kind of sorter.
How does that sound Tim? And @Fynn