Liked Arrival a great deal in its way, strange cocktail of ethnopolitics, white America, the philosophy of language, science and the Rapture.
It's an interesting contrast to Sicario (Villeneuve's previous film). A comparative essay on the two would be good. Bodes quite well for the Blade Runner sequel, too.
I enjoyed the central performance too, and as you say Asterix the final fifteen minutes or so were a bit hard to take. Apparently the Ted Chiang short story it's based on has a lot more fascinating exploration of the science fiction aspects of the premise.