Most of those review sites don't look at football the same way people around here do. They approach the game like kids, casual gamers, and casual fans do. They are concerned more with the overall aspects of the game and don't really dive into details like hardcore football fans/gamers do. If it looks like football, sounds like football, has some cool animations, and generally gives them a pleasant time, they're not going to come down on the game because they don't have any speed rushes, double-team blocking is nonexistent on passes, wishbone CPU AI is bad, linemen don't engage defenders before leaking out on screen passes like they should, etc. These are smaller details for them and don't really detract from the experience.
The guy from IGN especially falls into this category. If you've ever seen him play the game (and he even mentions this in the beginning of his review), he's the kind of guy that drops back 20 yards and scrambles sideline to sideline before throwing a 50 yard bomb off his back foot to the opposite side of the field. Obviously, just because he plays like that doesn't mean all of them do, and just because you like the game doesn't mean you're just a casual gamer, but as far as reviewers go, they look at the game in a much more general sense then someone looking for a football sim who is looking at all the little details.
I freely admit that I've grown so tired of these games that I can't hardly play them when I get the opportunity, but the game isn't terrible. It's just average. It does a little bit of everything, but it doesn't do anything really well on the field in my opinion. So for those that don't really care about those little details and just want to play some football, you can have a really good time playing. For someone like me, who's constantly looking at the little details, I can't hardly get past the opening kickoff without shaking my head at something (zig-zag running, bad foot planting, static/patty-cake blocking). That's why you get such a wide gap in reviews/impressions.
And as for why there are so many more negative posts about the game when the community seems to be 50-50, 60-40 right now? Well, they're busy playing the game. If I had a football game I enjoyed, I wouldn't be wasting a bunch of my time on a forum ... I'd be playing. lol