The ending they went with works a lot better for the film conclusion. The original ending worked great in the book, but reading something on paper and seeing it on the screen are two very different experiences. The movie ending is a lot more visually stunning, action-packed and climatic.
It would have been cool to see though, if it had been filmed and then included as a bonus feature. I'd always wished they'd filmed the scene of Lex and the baby triceratops too. But Spielberg was very cafeful and deliberate in deciding what scenes to cut before time and effort and money was spent to film them.