The directors seemly determine to change a classic movie (and novel) . They erased lots of the original, especially the ending, but created nothing new. In my opinion, there in no ending in this story. The first half of this movie was still ok since it more or less follows the structure of original. However, the second half is just a meaningless movie of walking dead.
And the main theme of original story, about understanding of death, has not been well elaborated.