Story developed into a convoluted and uninteresting mess, wasting talents like Jeff Daniels and making the lead feel like she's not in the mood to act. I liked Shailene Woodley in the previous parts but here she felt like she's just here to collect the check, for most of the times (There are some good scenes of her). Also, it really bugged me that Miles Teller character got downgraded to the typical asshole again after getting some development in the previous part (*sigh*).
There are some good action scenes, but at the same time there are some bad ones too with clearly lazy choreography. The whole war ordeal was so mishandled, I have a huge affinity for such stuff and if they couldn't make it interesting enough for me to give a damn, then they really screwed up.
CGI was a mixed bag. The wasteland looked weird. And since the movie wasn't good enough to keep me interested, you notice a lot more plot holes in the story. I'll eventually watch the next and last part when it is released but after this, I'm in no way interested where the plot is headed.