I am a casual, and I am not leaving. Well just raging at Titan X, but that is different.

Making FFXIV more social would help alot. Currently is based too much on 8 man content. Thus you get small social groups that 1 member leaving, etc affects whole social dynamics. They need to find a way to allow more people to work together for content but at the same time allow small groups to do.

Also vanity items are really needed. As a whole BiS loot should be obtainable by more the 50% of the population. Make it hard, not extremely hard. After which BiS looks that separate the norms from the leet should get harder and harder to obtain. That way everyone wins. Because sadly in this day and age, if majority of your population is stuck with second rate gear for too long and last tier gear is out of their grasp for too long, they start to leave.