Lea and Axel as separate beings?

So I was thinking while watching 358/2. There is such a big deal made over Sora and Roxas being separate beings (not to mention Xion). The same goes for Kairi and Namine. It's heavily implied though that Sora will be able to save Roxas and Namine and they will be able to become their own people, which is great!
But why is no fuss made over the other nobodies? Axel is perfectly happy to be Lea again and none of the others have shown that they care at all about their nobodies getting their own identities separate from their original selves. In fact thinking about it, it kinda bothers me a little that Lea is just Axel without the face tattoos. He doesn't even have a different set of clothes!

 

All the normal Nobodies are the exact same as their regular self. There is absolutely no difference between Axel or Lea
Roxas and Namine, due to the circumstances of their creation, grew int their own unique people

 

Like what hatok said, Lea and Axel are the same person. The same goes for the other Nobodies. Roxas and Namine are an exception since Sora was a heartless for a really short time, and Kairi never turned into a heartless.

 

Yeah.. Roxas had ven's heart most of the time, and even though he was conected to Sora, as both of them were "alive" at the same time they started to live different lives, the same can be said of Naminé (that wasn't formed by darkness, heart or light, only nothingness), She lived her life Kairi lived hers, even though at some point they were "together" and it is possible that Kairi remembers what Naminé did, most of the time they were separeted.

For most nobodies is different, their hearts are taken by the heartless and their "spirit and body" remains as a nobody, when both are reunited they recover their original form, but keep their experiences of being a nobody, for Sora his heartless was more "him" than his nobody, something that usualy doesn't happens.

 

Because they're not main characters.
Not enough care was put into characterization to differentiate between the two, so there's no point to expand upon something that isn't there to begin with.