I saw this image on Facebook and this reminded me of how MMO's took too big of steps away from their core. EC Tunnels was a great community layer that I always enjoyed but it took time, I understand that inconvenience. I thought the Bazaar was somewhat a positive step but they moved the community from the established EC. (i'm sure for programming purposes and to also move the community to the moon.)
However, with EQN, I would like to see EC brought back for a nod to nostalgia. How I would like to take a step back towards the community is this... I would like to see an open world marketplace, not an instance. Have housing also be open world surrounding the main cities. Freeport and Qeynos in the beginning would be exclusively the main cities and then their suburbs (much like in EQII) be open world, somewhat empty areas that you could begin establishing housing. You could then establish stores and "merc" merchants that if people spoke to it forwarded the messages to you in a vendor chat/email window.
This way, everyone is still walking the streets to the main city. Maybe places like EC you can establish satellite locations for your "merc" merchants in a marketplace and receive some type of bonus for populating and selling in those areas. Maybe less of a vendor fee. Regardless you want people, real people, together. There are ways to establish this without cutting it off completely.
Today, it's an AH that handles every facet of buying/selling for you. No haggling, no advertising, no anything.