Might have already been said but I have always wondered why guild houses aren't more interactive with the whole guild? If it's a "guild house" then the guild should be able to add things, and give people powers within the guild to change things around. Right now a guild house doesn't feel like a guild house at all, just a much bigger house that can't be open public without invite? I would expect this to be a thing by now especially with all the new housing features. To turn guild houses into a actual guild experience, not just one player within the guild, players from the guild should be able to donate any furniture they want to decorate the space. Which leads me to the suggestion of a whole new guild house. A Guild HeadQuarters that can be bought by the leader of the guild and controlled. Basically a giant guild house of sorts. A spar room and gsing arena would be a really nice touch. Overall I just think that a guild house needs to be a whole experience for the guild and somewhere the guild members can go to have fun, afk, chill, whatever. Guilds could even strive to have the most amazing Guild Headquarters, and it would be something that the whole guild would continue working on.
I don't think this would be that hard to implement and script. Just a little bit of work, but it would make so much more of an experience which is what matters.