As a lot of people know you have the option to make a mini estate and can have people over and relax and talk, but other than that and sitting on a bed or couch there isn't much added to it. (even after 7 years not much happened) i have an idea of adding mini games to the estate that way you can play with other guild mates or friends have some fun other than grind out levels every day. just like the water balloon fight kingdom quest or the spooky KQ that happens once a year, do something alike.
dont know if anyone else thought about it but the estates are boring and nothing to do in them xD
even adding farming/gardening for your own materials like saps and toadstools would be nice too