Could have had some more tension and suspense, it was the perfect environment for it. Picky. But it could have.
Like, THE twist of the movie was revealed and accepted by the people too quickly. I thought for sure there was going to be another big twist later, but it didn't happen. Everything that happened after he realized there was clones was just extra proof of what we had already accepted about halfway through the movie: YES THERE'S CLONES, AND YOU'RE NOT THE ORIGINAL.