I think the whole Sanctum of the Twelve thing would just be optional for those who really want an immersive experience. So players can book the locale, but for those who don't have the gil/time/care to do so can book other locales, or choose their own personal locale without the required booking/extensive planning. Since we all know players will flood that place regardless and it'll ruin the immersion for the few who actually look forward to that sort of thing.

I'm sure they'd like to implement something to please the role-players while also pleasing those who just play to play. If that makes sense.