My thoughts? (It was decent, spoilers) LONG POST
I think this film relied more heavily on Noomi's revenge plot than Colin's (and suffered for it?). IMO, Colin had a very legitimate reason for wanting revenge, specifically to kill someone who took his family away from him.
Knowing the story and watching the movie again, Noomi's character came off as manipulative and vain (please hear me out, I'm not trying to offend).
She was cool right up until she tried to blackmail him into committing murder.
Her face wasn't really bad at all and from the crash pictures, she is lucky only her face was damaged (e.g. not her spine, BRAIN, etc). She had video of Colin killing a man in his apartment, but the story behind that is revealed throughout the movie: the guy he killed had figured out (just like Dominic Cooper does by the end) who Colin really was.
He was a good man who tried to stand up to crime resulting his wife and daughter dying. She (after reconstruction) only had some scars, but wanted that man dead. It wasn't until almost the end of the movie that she realizes she pulled a man who looks like Colin (who, even as a straight man, I can say is attractive). Her job was waiting on her- her boss even tried to set her up with a therapist (which I guess is what both of them needed).
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Sorry for the long post, but I said it was a decent movie and this is only 1 of the things that brought it down.