I've since seen the movie for a second time after previously voting that I had only seen it once. At the time, I didn't intend to see it again because I was so letdown after that first viewing. However, my theater was playing it in IMAX 2D so I figured I'd give it another shot (can't stand 3D).
The second time was much better. Now that I knew what to expect, I could let go of my preconceptions. Regardless of whether or not I would've done things differently, this was the movie we got and I feel it's important to judge the movie on its own terms.
The pacing didn't bother me as much, the dream sequences weren't quite as jarring and the ending was now acceptable. The Martha bit is still irksome, but less so (I can tolerate it), but Superman had virtually nothing to do (I mean, come on! he's a title character), Wallace Keefe's subplot was still underdeveloped (as was Finch) and Lex Jr is still not what I want from Luthor. Eisenberg does fine for what the role calls for, but that's not the Lex I've always pictured in my head (or in the comics). Oh, well. Win some, lose some.
First time I gave it a 6/10, now I'm leaning between a 7-7.5. Very similar to The Force Awakens (which I gave a 7.5/10, 4th best SW picture after the originals) in that it has significant problems (as well as lazy & puzzling story decisions), but overall the good outweighs the bad. I'd probably still give TFA the edge, if only because the new characters are so much fun to watch.