are you kidding me? correct me if im wrong but they never said why he was special, why he could stop birds in flight or attracted them, why he had that comic book with a polar bear in it, like they focused a lot on him being so special, than nothing at all.
Did you not read my response? He grew out of the role. If they continued using his character they'd also have to explain his rapid aging. Same thing with Ecko dieing the way he did over a contract dispute, those things are out of the writers hands. Besides, Walt was not even a good character and the majority of us don't care at all that they wrote him off the way he did and got back to the main storyline. They had an idea for him, or maybe they didn't even know where they were going with his story-line, either way it doesn't matter because they didn't anticipate him hitting puberty (Which they ARE at fault for, and hopefully writers in the future don't make a child one of the main characters in a show planned to go for years.) In a show like The Soprano's where AJ grew up it was cool because plenty of time could have passed between seasons but in Lost an hour or a day passed between seasons, rather then months or years (in the story).