Your first part about the themes being undeveloped or not being fully done justice towards are somewhat determined by what you feel the theme was really about. Superman finished what his father started and decided to make his own choices about what to do with the kryptonians. It's an epic in that sense. The idea of Lois knowing his identity and the fate of the world being at risk unless she spills the beans about it and yet she refuses to reveal Clark's secret. This means a lot to Superman and he mentions that. Also leaving him with someone to trust and give humanity a chance. That's the thing about Superman, he means so much and stands for so many different exemplary ideals and 'Man of Steel' not only triumphs in raising new questions 'Why didnt you come with me?' etc..But in doing justice to the nature of who Superman really is and what he does for the greater good. That's a good point about wanting a few more dialogue scenes between Perry and Jenny with Superman. Especially at the end, but remember that this is literally Superman's first day or two actually on the job. And he saves people from the first time we see Clark on the oil rig (after he gets saved himself which I think could lead to some of the decisions he makes over the course of the story). I'd imagine that the sequel will deal more with Superman's relations via the Daily Planet and so on. Also keep in mind that Gotham City has always been more crime driven than Metropolis. So to make the city of Metropolis out to be hopelessly crime or drug ridden wouldn't really make too much sense to me. Even though you seem to agree with this notion.