I'm anticipating a pattern at this point, Xemnas is gonna show up in the Grid at any moment now rocking his own skintight Tron outfit riding his own light bike to style on Sora and Riku
it's been ages since i touched on this part of kh, but i think it's one part withholding information and another part "you'd have no idea which heartless is yours" for most of the organization
Wait, is it more like the nobodies themselves wanted hearts, and considered their human selves to be a different person? That way it still tracks, but if thats not the case then yeah the plan was silly lol.
I only recall them being obsessed with gaining a heart and that their old selves were said to be gone for good, so I can only guess they were in the dark about being restored as soon as they perished
The Nobodies of Org 13 wanted hearts because they were told, repeatedly, that they had no hearts and merely mimicked emotions based off their memories of having been 'somebodies', tie-ing in to Roxas's feelings of isolation due to not having many Sora memories to go from due N to S speedrun any%
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Starting the Tron world
Xemnas iirc DOES carry on Nort's memories BUT I don't know for sure if he truly lost his memories or not under Ansem the Wise's wing
The consequence is this story would've ended a lot sooner. Donald and Goofy would've never hung out with him then.