XI did community & open world better.

Community
Kinda hard to say 1+1=2 for this topic because results vary but by (archaic) design the game had you work with people on your server you really started to get a sense of community like you would in a city or neighborhood. Inconvenient, archaic, bad design, took hours, punishing mechanics and systems all of these things yes, but for these reasons and others you worked closer with the people around you.

Open World
This is what I don't care for in XIV. Gorgeous open worlds you can just mount right through it with no sense of danger or adventuring. In many aspects XI was just a more challenging game and sometimes the bad kind of challenge but XI's open world dangers was the right kind of challenge.

There's more things XIV does right though, which is why I play it.