I have a lovely house in Mist but my alts can only access it if I leave it open to the public. Even when the house is unlocked, they are unable to use the garden or interact with the furniture.
I don't want to buy a separate house for each of my characters; even if the supply was unlimited that would not appeal to me. However, I do feel I'm not getting as much use from my house as I could. Being able to share it across my account would be a great QoL improvement.

There are so many threads on this board from people frustrated because of the housing shortage. Giving players like me the option to share a house between our alts won't solve the problem but it would have a positive impact.