YES fates are broken.

[Urielparadox]

because you can watch the same fate that is used for 0 quest spawn over 15 times each, sometimes 4 times in a row(literally right after you kill it it starts again), and the quest fates(which means they actualy have a use to exist in the game) never spawn. SE admitted in the live letter today that different fates do have different priority when it comes to chances to respawn, and almost all book fates(judging from the translation) are on the low end of the priority. meaning book fate may hva e 1/20 chances of showing up while, x fate that has no quest has a 1/2 chance of showing up. This is how SE programmed it. this is how they want it to work. It is not broken, it's just what us FF11 players Call SE logic, it makes 0 since to anyone in the world, except SE.