The thing about video games is that they're such a varied medium with differing genres that mean so much more to the end product than genres of books or movies. You have a completely different playstyle and level of control depending on the genre. Right now, I think, the industry is trying to move to a certain blending of genres together in order to create a new standard for the medium or to at least do something new with it. Uncharted games however unabashedly stick to their specific genre and attempt to give you the most out of it that they can.
I honestly almost feel like gaming journalism has to move to a genre based system where reviewers work within the predefined conventions of the type of game they are reviewing, but I know people just want a "is this better than this" kind of review. Comparing an RPG to a FPS is extremely hard though. In this case comparing a streamlined action-adventure game to a more open-world action-adventure game (Uncharted compared to Zelda perhaps) is still rather difficult. Both have a completely different mentality that they're working in.
That said I think the reviews should make it obvious, even Eurogamer's 8/10, that if you like this kind of game you'll love Uncharted 3 as it's the current pinnacle of the genre. If you don't like this kind of game, you might find it somewhat boring or predictable. They certainly don't bash the game, they just acknowledge the constraints placed on the genre alongside what the game actually does and place into consideration using their scores. There's nothing wrong with that, it just clashes with how other game reviewers do things. I'm fairly certain movie and book criticism has mostly evolved to the point of considering genre in a review, but then again film and novels have not had as major an overhaul in the medium as video games have had which is a medium that continues to revamp itself and continues to create 'sub-mediums' in the form of new genres or hybrid genres along with pushing the existing genres to newer and better standards every year nearly.
Take for instance Gametrailers, who I know have an odd reputation. They also seem to have a shifting scale of balance for their reviews. Their Battlefield 3 review gave a low (7 or something) review to story, but clearly in the final score they weighed the story much less than the other 3 aspects they use (design, gameplay and presentation, if I remember correctly) which were all somewhere in the 9's I think. This skewed the score to being in the 9's as well, as they gave the story a rating but didn't place much (if any) weight behind that for the overall score. BF3 after all is primarily played and certainly advertised as a multiplayer game, so they rated it as if they were rating a multiplayer game. I'm sure for Uncharted they probably give more merit to the story score as opposed to say, design, because it's a story driven game.
Sorry, this went longer than I expected but I guess I'm basically agreeing with the whole "game journalism is a weird field that has to account for many different factors and it's not easy".
This all being said, I'm really excited for Uncharted 3 and these reviews (even the 'controversial' or 'bad' scores of 8 seem to be positive in terms of what I'm looking for in this game which is really all that should matter when you watch/read a review) make me confident that it's not going to disappoint me at all and I'm going to love it.
Edit: I feel like I've written a short essay here and whenever I write an essay I always fail to explain myself in the clearest way possible on my first write, so apologies if you actually read this and some sentences seem odd; I hope you pick up on the main messages.