I'm sort of glad it's not an open ended version, everyone in the server would be cramming in to fight and it'd cause massive lag. Also those who don't want to participate needn't worry about seeing a huge battle clogging up their screen. A few quests take place in that area already (As do they in other hamlets around Eorzea.) so can you imagine how difficult it'd be to do these if you have to worry about mobs gang raping you the moment you stepped inside? Plus achievement NPCs happen to be in the same area for a few hamlets too.