I think a review should primarily inform you about the many aspects of the game that may or may not influence your purchase - content, graphics, whether multiplayer is solid etc etc. In this case, it is absolutely reasonable to expect an update, because what was published back then does not reflect at all what the game is like now. i.e this is spot on:
On the other hand, after such a long time after launch I don't think it's really going to matter anyway.
our original review no longer reflected its quality
On the other hand, after such a long time after launch I don't think it's really going to matter anyway.