Assuming that many here have seen the movie, there will be spoilers ahead…
The consensus seems to be that it was “alright”. Anybody want to argue that it was great? Terrible?
What could have made it better? The book was long thought to be unfilmable. Are the unfilmable aspect what was missing?
Personally, I think that the flaw of the movie was very similar to the way in which Man of Steel was flawed. I didn’t buy the tragedy. Though the movie tried to sell me the idea that Ender loved the Formics (it planted the seed rather ham-handedly right at the start and watered it throughout) I didn’t buy it. They broke the rule of “show, don’t tell” relentlessly.
Perhaps the book really was unfilmable as a movie. It seems to me that a six to ten hour mini-series with a smaller budget could have put the story on the screen more effectively. They should have aimed to be a new Game of Thrones rather than a new Hunger Games.