XIV has its own lore. The world is not the same as any other world.
A lot of the elements are the same. There's been a Cid in every FF game since, what, FFIII? If each game was so wholly original, they'd never even re-use chocobos or anything like that. I think maintaining the elements that make a Final Fantasy game a, well, FF game, is fine. Most of us would prefer that, in fact.