First off, i know there are more pressing things to be focusing on but once that's sorted out I think something like this should be considered.

The purpose would be social. All concurrent users of the faction are able to access the same chat channels, but only 60 'toons/avatars' would be visually present in your instance. Global Agenda had something similar, it was a Dome city and because it was a clan based game it was really good for banter, socialising and deciding which clan to join. It also had a fun battle arena that hosted FFA and team based combat.

EC is more faction based than clan/guild based but guild focused events seem to be planned to become a more prominent feature, a 'friendly' combat arena inside the faction HQ could make for a nice way for guilds to practice and gel.

First, I am not able to like you, Atreides. But second, yea, they mentioned that in the past. They want to make faction/guild specific areas, like Space Marines were supposed to have Ship above the planet where they can meet, Chaos some possessed fortress and maybe some gigantic webway sail hidden on Arkhona, or maybe Wraithship, who knows. But in the future faction specific areas will definitelly come.