I remember seeing a lot of similar complaints back during the previous expansions too.
"Oh, they BARELY used Amaurot for anything, and we didn't get ANY explanation of what Elidibus was up to!"
"Bah, what was that last zone? Azys Lla was barely used, I can't believe how pointless it was."
"What, Yotsuyu survived and we're not going to learn anything else about her? What a sham of a story!"
And no, 6.1 isn't going to be an entirely new story with no connection to the old one. What, do you think we're going to go to Garlemald, Elpis, the moon, and Ultima Thule again and NOT have it relate to the stuff that's happened before? Or do you think 6.1 will bring with it 6 new zones set in the New World or we'll be hopping over to the Second or something?