Ishgard housing will most like be a ward based system but I suppose we could be surprised. I wonder if they are planning to update apartments. They did seem to say awhile back that they were considering small, medium and large versions where you could upgrade them as you go. Those are probably the closest we'll get to instanced housing. It would be nice if there were options for gardening and the like. They really haven't said much about housing since they released Shirogane and one can hope we'll get some news in a live letter soon.