-lore that sometimes impedes convenience
-Repetitive formula
-Game's engine continues to reveal how outdated it gets year by year and cascades really badly into the game. For almost every little thing that should be in a world renowned mmorpg (more customization options, better storage values, etc), it can't be done
-Cash Shop shows no signs of being flexible. Its not the prices that get me as much as the lack of options. Can't buy separate pieces. No account wide options. The cart was finally added, which is a nice touch.
-The distinct impression that jpn playerbase is given far more attention than other regions. I'm not just talking about who they choose to hear first. I'm also talking about interactions between GMs and/or other staff that go beyond responding to support queries. (Like just having fun popping into the game and chatting it up with players).

There are some other things but they're not significant enough (for me) to put up as it changes depending on my mood. But for the above, that's what I really don't feel good about.