All MMOs take inspiration from each other so I wouldn't exactly call it stealing. It will, however, be interesting to see what Blizzard do with player housing given that they're pretty much the last major MMO that'll be implementing this system. Plus given that they're still the main MMO on the market, not having XIV's FOMO mechanics in their housing systems could become a nice stick to use against Square Enix in getting some tangible changes to XIV's housing system. Whatever happens, the FFXIV players still need to write proper feedback and suggestions in the channels recommended by the developers.