I am going to take a slightly more practical approach. I would keep and freeze the current ward system to allow those players who are willing to live with its limitations an opportunity to live there. For everyone else I would create a parallel instanced housing system that included a seamless exterior/ interior environment and removed the hard furnishing caps. I would allow for an upgrade/downgrade path in housing size on a common size plot. Furnishings would be determined by available space. For example someone might fill their plot with gardens leaving no free areas for other items. Where as someone without any garden might have room for 150 small footprint outdoor things. I would give access to the house to all alts on the same server. The house would be accessed by a common area with MB, shops, etc much like the barracks and hotel room are accessed in the cities. They could also be accessed directly via an aetheryte as is done today. I would also allow the house instance to select what it sees such as your neighbors, a beach, waterfall, etc.