Some FATEs aren't popular. For example "Giant Seps", near the entrance of Stone Vigil in Coerthas. As such, people never play these FATEs, which is a shame.

To conquer this, why not set an EXP+ yield on all of the FATEs depending on how long they have remained untouched? As such, people will always be drawn to whatever FATE is available.

I find it sad that some FATEs never are being played and hope that Square Enix will consider and act on this.