Yes I can see he might have been closer to the ACTUAL Dredd.... but that doesn't make it a good film or a good character...in this film his character was boring, the action was boring, the fights were basically boring and thats it.
As I said, the first film wasn't necessarily "Dredd" and was just a cop, but he was a likeable cop, a cop you wanted to win, and an actual, you know, plot. There were fights where you felt like he was actually in danger of being killed, there were fights that went on for more than 30 seconds, there was an enemy you could believe was bad ass and it was explained how he got to be who/where/why he was.
First film, friendship, betrayal, vengeance, hatred, bit of love, bit of comic relief, bit of growth, some actual action.
Second film, building, split second of boobs, end.
His lack of having a personality didn't mean they had to stop everyone else in the film having one, nor make EVERY single henchmen completely useless and pointless, nor make the action one sided simple rubbish at every single stage. Again I haven't read the comics, maybe their is character growth and its subtle, maybe there isn't, when you have a very plain main character which has happened in other books/films, you tend to make up for this by having varied interesting partners or enemys, you compensate elsewhere, I can't say if the comic does do that. If the comic is no characters, no back storys beyond the insanely basic, and no good action I have no idea why anyone likes it. I could live with his character, and appreciate the style of having a character like that, if they made the rest of the film good, but they didn't, the rest of the film was crap.