Pros: The cinematography was flawless and well deserving of a 3peat for Lubezki (Though I would love for Deakins to win). The shot after the title card, starting from the water and ending with Leo shooting the elk, was amazing. The opening battle was flawless filmmaking as was Leo/Hardy's ending fight.
Acting was pretty great. Leo was great and really made you feel his injuries. I didn't think Hardy was that believable, though I know I am in the minority here.
The film really created a sense of scale and of the aloneness of Glass. The long run-time helped with this and I have 0 problem with the length. Hell, I could watch Lubezki's landscape shots for hours.
Cons: The third act was rushed. The feel of the film leading up to Glass arriving at the fort was completely different than after that. I thought the script became instantly worse with some clumsy dialogue, though I'll have to see it again to confirm this.
Though it is obvious that Glass wants to survive, I don't think they did a great job conveying how badly he wants revenge. I think this is a major flaw- most of the movie felt more like a survival story than a revenge story. Obviously survival was a big part of him getting revenge but until Glass arrives at the fort, I cant remember it ever really seeming like Glass really wanted revenge.
My biggest complaint, just because it would be so easy to fix, is how hurt Glass got and was able to survive. I mean, he got his throat slashed by a fucking bear and survived. They could have easily toned down the injuries a little but (ie. dont have him get his throat slashed by a fucking bear) and it wouldn't have taken anything away from the story.
Even with a few complaints, I loved this movie and it was probably my 3rd favorite of the year. However, if you aren't the kind of person that appreciates amazing cinematography like I do (nothing wrong with that obviously) you probably won't like it as much. That is probably the biggest problem with the movie as a whole- The plot is neglected in favor of the camera.