The real problem isn't the score the game is getting. Its what gamers perception of a game review has become. Ona a scale of 10, ten being highest, then a 5 literally is supposed to represent "average" or middle.
Destiny is a 7 for me cause its not really doing anything new or different and what it does do there are games out there that do it far better. Its the kinda game i would not have bought at full price, my current running excuse was that i just bought a white PS4.
Its a good game, it works and doesn't have any major gameplay flaws so its not broken. But its not a great game, that doesn't make it bad... just makes it not great. It could have been so much better though.