Well people like me, who didn't like it, expected a grand finale and world building but got anti climatic, boring, let's say everything is fake Asylum scenes.
Yeah, i guess it's all in the expectations.
Altough i went to see the film with the same expectations as everyone and i got surprised, in a good way.
Maybe it was not the grand final everyone was hoping, but it was a grand final alright. World building is certainly there.
What you call anti climatic, i tought it was really touching (Specially the end scene) and a fitting end for this set of characters.
I believe it is a matter of if you "get" the movie or not. With "get" i don't mean to say that people who did it are more smart than people who didn't liked the movie. It just means that we understand the intentions and vision of the director for this story, world and characters, personally it clicked with me.
The awesome thing about the movie is that it leaves open the posibility to expand this world, while at the same time closing these 3 character arcs in a very touching way.
Also the music is awesome.