I think Roxas deserves to have his own self. That's what I've got to say. Roxas is such a good character, that returning to Sora was not only a waste, but all Roxas peminat-peminat will live in agony. Imagine living in a normal town with a normal life and normal friends, only to have it suddenly come crashing down on anda as anda discover that anda don't exist, never were supposed to exist, anda will either return to darkness atau return to your original self (which is basically being erased from existence), and all your Friends and your whole world is just data. Roxas has a short, sad life that he doesn't deserve. He's always living in the shadow of Sora, the "better" version of him that actually exists. I believe that Roxas, and even Namine, deserve a comeback in one of the later KH games, where he and Sora can fight side sejak side as companions (and special nobody-somebody joint attacks???), rather than having happy-go-lucky Sora take the spotlight and a great character like Roxas rot away in KH archives, never again mentioned in the game.

That is my opinion of Roxas.