The complaining about her review is stupid.
- Does the score fit the tone? A quick read of the review suggests these are her main points: She says the combat is good, the self-referential third wall stuff is stupid, the scenario is twin peaks, moving is clunky, the voiceover is annoying, environments are spooky, the game is repetitive with few puzzles, it's polished and good looking, the story isn't as well told as some other in the genre. This suggests a good but not great score, which is what she gave it.
- Does the conclusion fit the rest of the article? "All the same, there's a weekend's worth of fun here for action-adventure fans who aren't too bothered about innovative concepts and varied gameplay, and don't mind a lot of repetition. Alan Wake is an accessible, undemanding game with a neat combat mechanic and decent visuals. It's just not a very original game, it's certainly not an exceptional one, and it's a shame it wasn't ready a few years ago." It seems like it fits my paraphrasing above.
- Do her points make sense in reference to other reviews? Well, seems like it. I think the collectibles thing is the only thing she mentions that isn't echoed in other reviews and the manuscript premonition stuff is mentioned by some reviews positively and some negatively.
- Is her score without a reasonable range of other reviews? Yes. It's not a 5. It's not a 4. It's not a 3. It's a 7.
Okay, so, to me her review seems pretty reasonable.
Then the next issue is whether a "casual" gamer should be reviewing a non-casual game. Frankly, I don't care. There's nothing wrong with a shooter fan reviewing a hockey game or an RPG guy reviewing a shooter. What's important is that they seem to understand the appeal of the genre and are able to compare it when necessary to other appropriate games.
The IGN Football Manager review sucked because the guy didn't get it. Roguelike reviews that complain that you die too often don't get it. Arcade game reviews that complain that you can finish the game in 20 minutes don't get it. These are bad reviews.
Her review is positively on the combat and compares the scenario/story/development to BioShock and Heavy Rain which both seem like appropriate comparisons to me. When she mentions the collectible thing, she acknowledges that many games do this, and provides explanation for why she feels AW differs.
Where's the beef?