There is a whole plethora of problems if you link the games, such as you are a blu or pup or cor or etc and you show up in eorzea where these jobs do not exist, then you have fanboys screaming they want their hard earned gear and jobs from xi to transfer no matter how they explain it lore wise. And that's just the tip of the iceberg. Im happy they are separate games. FFXIV has too much fan service as it is already. keep the titles separate. Heck I wont even play dissidia because I find it a corruption of story and franchise and SE just trying to make a buck. They wont get my dollars for it. Plus they seem to focus on some of their worse characters...cloud and lightning.