Arrival presents some good philosophical questions, and does so in an interesting setting. The top questions are:
How does language affect our perception?
If you knew your fate, would you still do things the same way?
As such it's qualitatively a good Sci-Fi film. Should it be ranked as one of the best? I don't know, and honestly I don't care, because such rankings are always subjective.
RandomStickman
Remillard