It would be nice if one could modify/edit classes in multiple viewports simultaneously. Not just turn them on or off, but also override class attributes like textures etc.. This would speed up work if one is rendering different options for certain components, ie. cladding options, component colours.
Also it would be great, if one could override the texture for all aspects of object (wall, roof directions) with one button click. So you don't have to click 5 times to make sure the texture is going to be overridden for all aspects object.