Oh yeah. Huge props for the opening sequence. That was easily the best addition made to the whole thing. That part was brilliant.
Its little things, like the light outside Moloch's apartment flickering on and off, red, then not red, so that upon the reveal of the guy being dead, suddenly its lit incredibly red and dramatic and violent.
Or at the start, when Rorscarch is scaling the wall, and pulling himself up hand over hand, you feel the weight of the character, being HUMAN in the real world… in the movie he grappling hooks up and zips along in half a second. Makes him more superhuman and easier than it needed to be.
When they get to New York after the giant blast, and instead of seeing horrific carnage and the effect of what happened and the horror of Ozymandias' plan. (the only shots in the book to get full splash pages, for maximum impact) Maybe the extended cut fixes this? But instead of that, we're just sort of given a crater, no real reaction to the death and destruction, and then move on.
The use of contemporary songs, exactly as they were, not affected in the least by a diverged timeline or the changes in technology or God walking upon them.
Its lots of little stuff like that, which, while none of them a big deal on their own at all, and being very nitpicky individually, none of them deal breakers... add up over dozens of instances to take something that's hard to define away from the material.
I saw the movie at the theater twice in two days, I never do that. It WAS the comic brought to life, and I loved it at the time. Again, it got it like, 92% right, far closer than it had any right to be. It wasn't until later that the little things settled in and started adding up and I realized why it felt off.
And if I'd never read the comic at all? No telling. I might have loved it and watched it dozens of times. Or I might have been confused and bothered and bored and only saw it once. Impossible to know.