I think the movie tried to do a lot of interesting things, but it was very uneven. The ideas were good, the execution was a bit clumsy at times. The Bruce Wayne/Alfred dynamic was great. Snyder actually does make some good casting choices, even if he doesn't always give them great direction, but Jeremy Irons as a tired, more combative Alfred that has seen too much of how Bruce Wayne has lost the way was a great choice.
I liked that they tried to give Clark a bit more to do as an actual journalist, and the extended scenes give you more of that. I wished they'd made his view on Batman a little less black and white, though. John Byrne, when he was rebooting Superman post-crisis in the 80s did a nice take on the new Superman/Batman dynamic where Superman basically realized just how corrupt and ambiguous Gotham and its criminal underworld was, and how the moral simplicity that worked so well for him in Metropolis wasn't going to cut it in Gotham, and that's why Batman acted the way he did.
I wish there had been a bit more give-and-take between the two in terms of their attitudes towards each other. Clark shouldn't have automatically thought "Batman executes criminals indirectly with his brand, therefore, he's bad and needs to go to jail." And Batman should have had more nuance to his argument. On the face of it, I don't have an issue even with his "If there's even a 1% chance that he's going to be evil, we have to take that chance as a given," since that's often the argument people use for "smaller scale" convicted criminals like rapists and pedophiles and why they shouldn't be allowed to work with children and women. But I think it would have been more justified for him to believe this danger not because of Superman, but because of US. I would have found it more realistic to think his big worry would be that Superman wants to do good, and wants a safe, orderly society, and if humanity can't get its act together, Superman will force the issue and create society that does this. I could see how Batman, being a cynic about humanity's inherent goodness, would find that to be a realistic threat, that people always complain that God never steps in fixes things. Well, this god will do just that, and take away your freedom in order to do it, because he's already decided he gave you a shot and you blew it.
There was a lot of interesting opportunities here for the movie to explore different kinds of heroism and how they work--or don't--in modern society, but a lot of that got undercut by Lex Luthor's manipulations which always strangled these ideas before they got a chance to get off the ground. Like the Senate hearing blowing up. Superman really should have had a chance to speak. There should have been an argument withe everyone, including Superman, questioning his role.