M'kay, I try to give Yahtzee some leeway, and I'll admit of his MMO reviews, this one is definitely the least scathing. However as someone who's playing GW2, I think his criticism that there is no plot is a complete load. GW2 has just as much plot as WoW did at the start of its release. Yahtzee says the only thing resembling a plot was the fact the elder dragons have woken up and are threatening the world, but outside of that there's no real sense of what your role in it is. Well what did the base WoW game start you out with? Hell, I don't even remember them announcing the primary antagonist with that one, you were just supposed to follow the quest lines until you eventually were lead up to Ragnaros, or whatever his name was. It wasn't until the expansions they began letting you know who you would ultimately be fighting at the end.
The problem here seems to be Yahtzee is completely ignoring the back story in the game. I wouldn't expect him to read both of the novels they came out with and give a full synopsis of the backstory in his video, but he could at least acknowledge it. He says there's no plot outside the elder dragons, completely ignoring things like the 250 years of conflict between the humans and the charr and the tentative alliance they're now forming, the creation and emergence of the sylvari, the doom of Ascalon, I mean holy crap that's a lot to just gloss over.