Everything about the XI UI was fantastic. "Don't try to fix what isn't broken" just port the whole thing to XIV and clean it up with new graphics and add in what needs to be added. Also, it's been proven that keeping everything server side doesn't prevent botting or RMT since by now most everyone has seen those idiots in some form or another in XIV, so make the UI client side so there's no lag what-so-ever. Just imo.