Personally I think the mount systems in other MMOs has become far over simplified. I think SE should look into a system where in you have to capture and tame your mount rather than breeding or just buying them..

That being said, I also think SE should stick with the current lore implimented in the game.. There are not enough chocobos in Eorzea and theirfor not everyone can have one. That being the current situation, Chocobos should be pretty rare epic mounts that are hard to get and in some form or another very Personalized.