> I think "Arrival" as a story is better than the movie. I think the movie misses on the part on how hard communication can be, and how different is the way aliens grok the reality as a whole.

The movie does not miss anything about the difficulties of communication because that is not what the movie is about: it is about motherhood/parenthood, love, grief.

That is the point I am making: how hard communication is, grokking reality as whole are some of the core themes of the story (is what I felt). The movie doesn't focus on these aspects at all, maybe these are hard to adapt in a mainstream Hollywood movie.