I'm not particularly interested in Destiny, but i wouldn't trust a single Day 1 review. It's really not the kind of game that can be properly critiqued in a short period of time.
If they want to do what is essentially an early impression, fine, but don't attach a score to it. People look at that number and see it as a representation of the product as a whole, not the fraction of low level content you managed to rush through before writing the "review".