It's not just the dub. It's the fact that they arrived anything they thought might be disturbing to children over five. One Piece is a show about pirates and fighting. People die, there's blood, guns and other weapons, people smoke (one main character constantly). So in order to sanitize the show for kids, they really had to remove a lot and consequently removed a lot of what made the show as cool as it is. It's one thing to have a bad dub, it's another thing to completely alter a series.