That's a good observation between the differences of a piece of his heart vs the entire thing. Xehanort did groom Terra with darkness, however we could look at that as just making sure the vessel had enough darkness for Xehanort's liking, not so much for Terra himself.I disagree with this. This is purely from my gaming knowledge and I wouldn't be surprised if Ultimania or one of Nomura's various interviews prove me wrong, but Terra's case was very specific and I don't think even the DDD version of Norted that Sora went through is similar to that.
For one, Xehanort spent the whole BBS cultivating the Darkness in Terra's heart, not only to strenghten his body and his connection to the element itself, but also to make it easier for him to be possessed as he was already seduced by the Darkness, just like what happened to Riku in KH1.
He also had to fight against the wholeness of Xehanort's Heart; not a piece of it like Sora, or his Heartless like Riku.
That being said, I agree with everything else you said. But they barely developed the beings that split from Xehanort, much less going in detail about what being Norted meant.
Xemnas was hinted to be his own being made from Terra and Xehanort through KH2 and Days; a villain, yes, but still his own person. DDD took this one step further by confirming that all Nobodies were able to grow new hearts, something that could have happened to Xemnas as well as he was a unique being as much as Roxas and Xion were.
Yet, this is never discussed on 3. We never have Roxas and Xion confronting Xemnas about who he truly was and how similar they were to him, nor is it ever addressed if Xemnas had a new, separate heart from Xehanort himself (which I believe should have been the case, really. lol)
Just another wasted concept that we'll probably never learn about unless Dark Road touches upon the specifics of how transfering your own heart works.
In regards to Riku, I would say Ansem SOD was just as bad to Riku as Xehanort was to Terra. Even after Ansem was vanquished, he existed in Riku's heart to the point of Riku taking on his form. It lasted in COM, Days, and KH2 the Riku struggle with Ansem. However I agree that with just the piece of his heart, we don't know how much control it grants. If only it was explained more.
Because we don't truly explore the 13 Seekers of Darkness, we don't know how much about his heart pieces. Clearly it didn't stop half the members from doing whatever they wanted and make their own plans, and turning on the group. I do wish we got more on how norting works and how having a piece of Xehanort in your heart works because as of now it's just wasted potential of something that was once built up as a big deal. Like do Ansem, Xemnas, Young Xehanort, or Terranort need pieces when they already are Xehanort?
Bless you for this post, Dast. The Sigil's execution wasn't good but I do appreciate what they were trying to do. And this post makes me see it in a new light and respect it more. Though I'm still gonna make fun of it for my own amusement, lol.I thought his death scene implied Xemnas had grown a new heart as Sora says to him 'I know you have a heart' and Xemnas talks about his 'first surge of emotion in years' and the pain of having a heart. Honestly, I thought it was quite a good ending for him, but admittedly it doesn't really follow from anything else about him in the game itself.
Thinking about it, his end contrasts nicely with the Re Mind RAX Sigil stuff (please hear me out). Roxas and Xion are ultimately able to exist because of their connections to each other, represented by the Sigil (It's really poorly executed but the core idea is good). When Xemnas is defeated, he feels 'the emptiness where [his] companions once stood' and his casting them aside and not forming connections left him with 'nothing' and he ceased to exist.