Ehayate's example closely resemble my experiences in this game without a parser. It is horrible, the one time I have actually been kicked from a group in this game was because of a perception that I had low dps (SMN not topping the enemity gauge maybe?). I couldn't argue with the group, I couldn't suggest improvement, and also I couldn't blame them. There was a problem and the group needed to fix it. The fact that the game doesn't give them the tools to make an informed plan of action is the root of the issue.