With Aeternum growing, I think asking for a 4th house is reasonable. With that being said I know trophies are not ideal for 4 houses.
Ideally it would be nice to be able to place all our trophies on our walls and have the option to select and deselect which ones we want activated at the time from our character bio screen. But also still making it to where you can only have 3 per 1 type of buff at a time.