Hopefully as little filler as possible. Each feature should have its counterpart manifested in-universe. Likely the tower for mission select/ travel and spaceship customization, clan/faction hall for group contacts, armory and character customization, and finally an arena or some virtual training battlefield for competitive pvp. Fast traveling to and from these spaces should be an option as well as walking through the interstitial scenery, to overhear the usual NPC chatter or bump into players waiting for friends or not sure of what to do next. But putting a ton of work into a giant baroquely detailed space or russian nesting dolls of spaces where no combat happens is a waste and tedious to sludge through to get to the meat of the game. People say they want heaps and loads of details but end up complaining later when they realize the most enjoyable parts are buried in layers of clutter. It's not a matter of you guys setting your hopes unrealistically it's not recognizing game design principles. The City is somewhat of a replacement for navigating to game modes solely through start menus. Yes, it will be awesome scenery and immersive, but it will also need to be lean to serve its intended purpose.