Reviews have been broken ever since the middle of last gen. But I think its not so much the 'review system' as much as the 'reviewers'. Its the fact that we're expecting a group of 4-6 people to rate all types of games of every genre equally based on their own bias and opinions. They already have their own favorite series and genres, yet they're expected to hand-pick the best games and the worst games. Of course certain games are going to get a lower score than they should or other games are going to get an inflated score.
An even bigger problem most people don't point out, because most people don't pay attention to reviews outside of the self named 'AAA' titles, is that games OUTSIDE of the major titles get ignored or downscored. Why should a game like Fire Emblem or Dragon Quest get less Attention than Fable or Final Fantasy? Just because they're less 'popular'? Because they have less marketing? That's pretty much basis for me to say the basis for reviewing games is not only broken, it should be killed outright.