Let us all be honest with ourselves. FATE's are the quickest way to level, though is that a bad thing? Honestly, by checking throughout this whole forum I can tell that a few people are resolutely going to yell very loudly at their monitors "Yes", so let us tackle the subject and the symptoms of the problems and try to match them with the supposed culprit that many are accusing.
On quite a few of the topics that I have browsed, people have put up the claim that it ruins the dungeon experience. Claiming that people do not know how to act in dungeons, or how to properly utilize their class or their position in a dungeon to progressively assist the people they are placed with. I have been a witness to this at all levels of gameplay. From Sastasha to Ifrit (Hard-Mode), there are players through every level of the game within the community that do not know or do not care to know how to play their class properly without hindering the team they are in.