Good sf, brilliant plot, some points to overthink

Rating: 9/10 (16 April 2017)

Very interesting nice realistic-like sf! Plot is brilliant, and I have to confess I actually did not understand it entirely after seeing and had to research IMDb for that.
Again, it's about time circles: Louise's daughter dies of cancer and she has flashbacks a couple of years before; she already knows the private number of general Chang that he is going to give her in a distant future, along with the very words that will make him change his mind and saves the world a war, and in 3000 years the aliens will need our help, they know this already. (The good news: it seems we will still be around by that time).
In some of the comments, Louise is accused of being selfish, because she knows what is going to happen to her daughter and still accepts to get pregnant. I understand the accusations, and I myself would do everything to cheat the inevitable and avoid a child. But: there's a thing about time circles, maybe she just couldn't avoid! After all, she became able to look in 4th dimension (time) and foresee future, but if there was no daughter this WASN'T the future. Like, if a paranormal gifted person tells me she sees me dying next day in crashing flight 241, so I cancel my ticket, she proved she is not para normally gifted because her viewing was incorrect.
Has also to do with the question whether universe is deterministic; do we have a free will or are we just driven by a bunch of physical and chemical processes in our heads, so that future basically can be calculated? I don't know, but actually exactly because of these contradictions I do not believe that viewings in future are really possible (in distance, maybe yes).
Minus point in the movie: it seems very improbable to me that there would happen such a strong rebellion in the US army in this critical situation, that authorities are disobeyed even getting to the point to enter advanced explosives into the space ship. This was probably added to avoid a lack of action in the movie and to have at least one explosion.
The part where she suddenly can stand the aliens physical environment including gasses etc., when she is lifted up by a black shuttle and meets Costello, actually I'm not sure how to interprete this, it's unclear to me. Was this all in her head, was the contact brought by telepathy and suggestion? Meanwhile, Costello knew a lot more about humanity and her mind, so it's possible, but not sure.