I'd say this is typical for most forums. It's just more common to have people come about and complain about something that is wrong than give praise for what works right. That and sometimes the people who do dislike something are really the minority.

Right now I'd say the community has a few good reasons to be a bit sour, but it relates to the later content released during the lull between expansions rather than the expansion itself. Bazja had a ton of problems that plagued it for a good couple of months and the big crafter push that had went so positively had diminishing returns after the second phase of reconstruction. One could say the game is incredibly fun to play through, but due to all that focus on the playthrough, the end game activities and class design can be rough.