Whats the Deal with the Endings (Score 1)

I have read all of the Stephenson books and I never had a huge problems with the endings, but I agree that he does end his books too abruptly. I could have read twice as much in Diamond Age about the nanotech and the society that Nell and the rest lived in. But i digress, my real question is what is the philisophical problem that Orson Scott Card has with ending? I have read the entire Enders Game series and I thought it was incredible.