Hmm interesting. I wish Normura would confirm this, but I feel he planned for them to have their hearts taken later on the series. It is the only way that it makes sense. Sure nobodies have slight changes, but with the dusk and lower nobodies age discussion I think the debate was the organization and not the lesser nobodies. Dusks, creepers, etc. They are all malformed like somebody mentioned which were not strong enough to receive an body or shell, but they also can't think for themselves and only follow orders from the organization. Certain higher nobodies are in control of the nobodies that most represent them. As for the heartless it makes sense that some of the somebodies could of been derived from the Neoshadow heartless (and not shadows) since if you look at them they are very organized in their attack patterns, blend in to the ground, ambush, hard to kill, not to mention the strongest of the pureblood heartless. It is speculating, but regarding on how some of the nobodies fight it wouldn't be impossible to rule them out.
Maybe they didn't lose their hearts in a year. It could of taken 5 or six years later or longer for the apprentices to lose their hearts.
Take this for example Even, Elaeus, and Dilan- remain the same because they are already adults when they fell into darkness. There are some slight differences though. Vexen-(has that weird eye of his) Briag looks younger, only somebody to in record to have powers, but later on he kind of resembled his nobody,( but I forgot if he had the elf like ears or not) Okay Elaeus looks the same as his nobody. Dilan has his hair tied back, while as Xaldin he has it in dread locks. Ienzo is small then as Zexion, is taller. Lea and Isa are about Ven's age (though Isa is older, as it states in one of the novels "Axel's seven days" that Saix is older than Axel) and then as Axel and Saix their hair is longer and Axel has tattoos while Saix has an X across his face and elf like ears. Not to mention the yellow eyes.
Isa and Briag might have fallen into darkness faster than the rest besides Xenmas's somebody. They both have the elf like ears and yellow eyes.
Ienzo was also either Even or Ansem's apprentice, but it still baffles the subject that he uses illusion, but if he chose to remain a certain age wouldn't his powers eventually get weaken by it?
