Lots say no because people (that say no) assume someone is asking for Eorzea to turn into Vana`diel -- yet they somehow find it perfectly ok for Eorzea to turn into Azeroth or Arborea even though the thought process is the exact same of those who suggest FFXI features or content concepts -- take what works, put a spin of it to make it work even better.

All MMOs does it -- heck Rift only succeeded because it did it and SWTOR only got popular because it does something another MMO hasn't done yet and it's based around one of the most popular sagas to ever exist, but people's personal vendetta against XI or jaded experience makes them assume someone suggests a sequel or direct copy. People should be complaining we're getting Black Mage and White Mage, they appeared in FFXI as well because clearly it's not a bad thing to use something from a previous game in the same series. >.>

What a lot of people who never touched FFXI doesn't realize is SE created a Final Fantasy MMO prior to XIV, as well as a Front Mission MMO -- they had all of the experience and know how to create a very solid and amazing MMO, but they threw it out because they wanted to differentiate XIV from XI for the sake of it, a mistake they later admit. (It's fine to make it different from XI story wise, but all FFs flowed off of each other without being direct sequels, it's what made the series work.)