I don’t know why people feel that they have the right to bash any content Anet puts out unless there’s something fundamentally wrong with it. Unless something is fundamentally flawed about the new content, people should just sit back and enjoy it. And no, not being able to get all the achievements for events like these is not a fundamental flaw. They are called achievements for a reason. Compared to business models of other MMOs, for no monthly fee, we shouldn’t even be getting this much new content on a regular basis.
Some people who are complaining need to step back and realize they don’t have a right to openly and vehemently criticize free content that other people worked diligently on that they are simply consuming. It’s much easier to consume and critique something than to create something. Those that are spending a lot of time criticizing new content like this should learn basic respect and appreciate what is essentially being presented as a gift to them.