I think they will keep adding more content after 6.5. People enjoy the content. Unlike ishgard restoration where once we rebuilt the homes it was done or bozja where once you defeat the lady its pretty much over. The benefit of this is there is many ideas they could still do. They could add more islands. More animals. More systems, I would like to see maybe something like breeding animals,cooking minigame,treasure hunting (its a secluded island. Has to be something here) Maybe they could finally give us blitzball as a island game since there is water everywhere.