After you have used up all the quests, you do hunting logs, grind Fates, do dungeons, do leve's, or grind mobs. I do a healthy mix of Leve's, hunting logs and Fates. Dungeons I will do the first time or with friends. But, just grinding them to get xp is completely not worth it, the amount of time compared to the amount of xp you get is terrible.

I think the problem in EVERY game is that if there is a preferred way of doing something, then people start calling for nerfs. Why would you want a nerf on something, just because others prefer it? You want to pigeon hole those people who prefer that option, in to doing what YOU prefer doing? Why not make dungeons worth more xp, or make leve's give more xp? No, no, its just nerf Fates.

I think they put in Fates just for this very thing. They figured "Hey! We have all the other options, so lets throw this in there as well, more options is always better!" Stop calling for nerfs just because you dont prefer to level this way, others do.