Hmm... So, if I say that I had no expectations about this movie, I will be lying. But I did try to keep them as low as possible, because, let's be honest, the story of Shingeki no Kyojin is next to impossible to portray in live-action, no matter what anyone is saying and we all know it. I doubt even one of the big Hollywood studios will be able to pull it of, so yeah... As a fan of both the series and manga, I tried to do my absolute best not to have expectations.
Sad truth is that the final product shows some signs that the staff involved at least tried to do something plausible. (When you have a story so impossible to portray you change it, okay. I get that.) But the way they tried to do it is just - laughable, or to say it simply it is like someone said - hey, let's just strip the story of everything that makes it genuine, put a few new characters, and take away all of the personality the few original characters have (except Hanji/Hange). The result - yet another love triangle story that just so happens to take place in a world full of man-eating creatures. (Yeah. This sentence basically summaries the whole movie. I am not kidding.)
And yeah, the staff really did try to create something plausible, because the movie is beautiful. The special effects are well done. The titans are almost believable, but to be honest the impact they could have made was totally lost because the characters in the story were the exact opposite. I could talk about how emotionless and blank-faced all of the cast is for hours, but I will limit myself only to Miura Haruma, who by the way I absolutely love, but even he (and how good he looks in the uniform) can't save this movie. In fact I think this is his worst role ever. Most of the time his Eren is just standing there looking hurt or blank-faced without any apparent reason for that. Not to mention that he spent almost the whole movie running from the titans, not fighting them. When we include the fact that everyone around him did almost the same, I think you get the picture.
I gave it a chance. I tried to think of something good to say , but what is there to like in a movie that made me laugh almost hysterically because of how ridiculous it was. I am rating it with two stars, because as I said the movie is beautifully filmed and some of the scenes are well choreographed, but when you take it as whole the beauty is just not enough. So, yeah. I tried to expect basically nothing, but if I say that this movie is even worse than my lowest expectations I will not be lying. In fact, Haruma or not, this is just one of the worst live-action adaptations I have ever seen. And not because it doesn't follow the original story. But because it takes on original, out-of-the-box concept and replaces it something stereotypical. Which is sad in a way, because they could have done so much better.