Lightning appearing in a FATE by itself wouldn't be so bad, but Lightning Returns seems to be comprised almost entirely of crossovers with previous Final Fantasy games, not to mention it is already a three-quel; there is a level of subtlety that lends itself to cameos and cross-promotion, and this is not subtle in the least. The individual ideas themselves are not bad, but Square Enix appear to have just decided that every idea was great and to use them all at once. It just reeks of desperation.

I like Lightning, but I've also had great friends stay at my house for a week and after that much contact with something you just want it smurfing out. They're only harming Lightning's image for the broader public, especially those who didn't like her in the first place.