Re: DC's New 52: Reviews and Discussion (Spoilers welcolme and likely)
It's Barbara Gordon as Nightwing. Miller originally wanted to use Stephanie Brown but this was rejected by DC Editorial. You're pretty much the only person I've encountered who's read the series so far and had problems with it. I've had nearly no complaints about it. It's been outstanding. Regarding Superman's lack of presence, keep in mind this is essentially a Superman Year One story. Of course Clark would not have the presence that the comic version does. He's earning his stripes still.
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Ignoring the The Last Stand since 2011.