Going by his words, the great bulk of downsides, while bulky indeed, is all bugs and glitches that can and most likely will all be ironed out in time. It's a typical downside of MMOs at start and this one is no stellar production with a mountain of money behind it. All the game elements are merely above average, he says, but it's greatest quality is how they come together to form a much more than above average experience. Why then didn't it get the medal "Better Than the Sum of its Parts"? It would seem it deserves it more than most games and it would be the most relevant medal it could have.
Rather than speak of the bugs for half of the review, which is a debatable downside, especially in an MMO, I would rather he speak of other denotations he makes in summary of the written review, like the "wonderless world" one. Yet he never mentions this aspect, nor some others.