I got a random idea that could possibly be implemented sometimes in the future. As someone who's interested in making guild hall more beautiful and fill it with random stuff, I kinda find it annoying that I cannot see how the item will actually fit into the place until I actually craft it/buy it.
The idea is that we get the ability to project certain stuff in GH without previously getting decorations. Think of it like this: I want to build the living room in some part of the GH, i open up the decorations tab, choose what i want to put in there (chairs for example), and leave it on the ground as 'project item' (can be like silhouette of an object). Next, when I finish projecting whole place, I go out there collect the mats and build the stuff I need. After that, I simply go to the previously projected area, and by single F click, silhouette is filled with actual object.
I believe this would make guild hall decorating much easier, especially if the items needed for guild halls are bought with some currencies (like racing tokens for example).