My personal chocobo "Karma" (that's his name), would be very sad if I had another chocobo friend. :( I'd never cheat on him!
Why should you get a chocobo mount as a drop...of all things? I think it's for the reason that chocobos *are* our special friends that they aren't mere drops. That would kind of cheapen them... cause we all know that some derpy person that was dead most of the fight is gonna win it anyway! :P (if you saw SE's 8bit Titan video you know what I mean.... lol)
They are our pals, we *all* get one. If you would like a glow or shimmer effect for a chocobo, how about like a special barding that gives them that effect?
We can already dress them up in barding and dye their feathers.... rename them whatever... level them up even and buff them... adding some glowy effect sounds like very little extra trouble.
