Batman spares Superman's life because their mothers shared the same first name? Are you fucking kidding me? Who fucking greenlit this shit?
I'm sorry, I had to get that off my chest. But seriously, I don't think the movie was awful. Not quite good, but not as bad as I was expecting. I'd say they've got the Batman side of it down fairly well (his rather cavalier attitude to killing aside), but Superman is once again all scowls and sullen brooding, without a hint of the optimism and positivity the character is supposed to embody. Like Vindictus mentioned, the BvS fight isn't the climax of the film, but a five-minute prelude to Doomsday, who shouldn't have been in the movie at all. Or at the very least, they should have given him a design that wasn't so generic and butt-ugly. And Lex Luthor is just fucking horrible. He's not funny in the slightest, just obnoxious, and his motivation - something that I've always felt is the most interesting element of his character - is barely touched on. Something something my daddy hit me tee hee I'm just so cuh-razy!!! Was he trying to do a riff on the Joker? I wouldn't be surprised if he was. WB wants all their superheroes to be like Batman, so it makes sense that they would want all their villains to be like Batman's villains.
They definitely need to get rid of Snyder as surely as they do Goyer, though. The overall organization of this film, as in its pacing and editing, are completely fucked. The first hour or so suffers the most from it. There's no transition, no establishing shots, nothing to help guide the audience along with the flow of the plot. It just lurches from scene to scene with quick cuts in very short lengths of time. Suddenly we're in the Indian Ocean. Suddenly we're in Africa. Suddenly we're in LexCorp. Suddenly we're at the Daily Planet. Suddenly we're in Lois and Clark's home. Suddenly we're in a prophetic dream. Snyder zips from scene to scene as casually as he would switch perspectives when two characters are talking. He's fine for flashy action, but for a multi-pronged story that follows several characters in different subplots, he's no good at all.