If you had the power to add one feature no questions asked, what would it be?

[Corvus_V]

Instanced Housing, so you can spend 50m and buy a large size, 20m on a medium size, or 3m on a small size house on a homestead with an exterior and interior that is the functional equivalent of a plot, with a customizable backdrop for each current zone in the form of a city dwelling, and a wilderness dwelling. i.e) Empyreum house/Coerthas Western house. Lavender Beds House/Haukke Manor. Mists House/Beach House. Goblet House/Forgotten Springs. Shirogane/Yanxia. Wouldn't even have to design a new interior for each zone, just a small exterior area, with an invisible wall akin to a skybox.

Would affect the servers to the same extent Island Sanctuary did, since it'd just be loaded whenever you're there, and you could have entry points in various overworld zones with a short alpha-numeric location code for people to visit (if you allow it.) It'd singlehandedly destroy all value in ward RMT, shell FCs, and housing grief. It'd be an absolutely massive gil-sink. There's literally a million reasons to do it and none not to