Sora: OK! I get it! Everyone's trying to be someone they are not! I get the moral! Now can we just fix this darned world so I can make out with Princess Kairi over there before this headache loosens my hair gel?!? I mean, enough is enough!
What I don't get is why Sora couldn't "feel" Ventus within the Castle during COH? I mean, isn't he somewhat heightened to those senses?
Ultimately, if Aqua is getting out of that dark beach, I bet you anything Ansem's coming with her. Or not...Ansem... Heck, for all we know, Ansem done turned himself into a Nobody after that implosion...
As for the forgetting about the Land of Departure, I suppose it's the same thing with Radiant Garden. When the world changes, apparently memories are altered so that the true "name" of the place is lost until it is restored to its original form. And all that balony.