I didn't think it was wise to begin Superman's first major action sequence as a disaster porn fight, and not in Smallville either. We saw Superman save Lois before he ever gets to be revealed as Superman to the rest of the world. The first time he's introduced and his first major action sequence was in a fight in Smallville. So the impression people got of him was that he was dangerous.
Clark Kent didn't adopt the secret identity till the end of the movie, or start working at the Daily Planet first before he became Superman. I know they wanted to do a different take and I respect that. Seeing things, plotlines that weren't necessarily the same as the traditional story, e.g. Krypton's people being genetically engineered, seeing Krypton explode after Kal-El's ship is sent away, Jor-El being killed by Zod...how Lois and Clark/Superman first meet...but this time he's just Clark/Kal-El when Lois meets him, and that...also Clark not becoming the reporter with glasses until the end of the movie.
I was okay with the changes like with Krypton, Lois knowing who Clark Kent is, but I think some of the other changes seemed to stop the story. That being no Clark Kent reporter before Superman, and most of all, Superman not having a to-the-rescue first sequence.
The mistake was here's...who is this guy? He's fighting two Kryptonian soldiers on the street in Smallville, breaks and destroys property. People are terrified and no one knows this guy is supposed to be Superman and on our side. This is the first major Superman sequence...and it's all this fighting. Should have been like in the middle. First Superman, say, he's revealed by stopping a falling plane, train or whatever...then this sequence.
Moreover, we didn't see much of Superman in Metropolis, which is supposed to be his main neighbourhood. Of course we didn't see Superman in Metropolis until the climax. It was like...his first time there.
With this being said, I think we've seen enough Smallville, we need...Superman...this is a Superman movie...well yeah with Batman too, he can have his cake and...okay you know what I mean. The setting should be in Metropolis more. It's like they haven't gotten there. Like Clark still hasn't fulfilled his destiny. No Jimmy Olsen yet, Luthor has red long hair...looks like we have a sequence or two at the Kent farm...again, and Martha might heavily be involved. Man of Steel just did not feel like a complete Superman movie. Where was the Daily Planet Clark Kent? And we're going back to Smallville again?
Still, from the trailers, and I'm hoping we will get some of Metropolis and Gotham. Hopefully it's not just the big battles.