I have made numerous suggestions on player housing over the years since WoD. Here is a link to one such post
With the announcement of AI-controlled companions in dungeons, why not apply the feature to player housing?
You can select to have some of your alts do various things around the house while you are logged onto another. Have two of your alts doing pet battles in the arena. An herbalist alt can be tending to herbs in the greenhouse. Your alt with the highest cooking skill could be cooking something. Anything that could make your house feel more lively than just you and the periodic guest player to show off your house to.