From the first batch of A Realm Reborn screenshots, we learned that a generic Delivery Moogle NPC will facilitate our in-game mail delivery. This is definitely a step up in terms of design for the Moogles in our current version, who all share the same basic character model & personality.
Wouldn't this be a great way to introduce Artemicion, a recurring Final Fantasy Moogle, who was in charge of delivering mail in Final Fantasy IX? There is also Stiltzkin, who also appears in Final Fantasy IX, and other Final Fantasy titles.
These type of cameos could feature their own quest lines, and serve to represent the Moogles a little better in Eorzea, don't you think?
Here's a quote from Naoki Yoshida I will twist out of context to bolster the cause:
Naoki Yoshida: In contrast with other MMORPGs, I’m seeing a trend towards…shall we say, FF-ness? Ours being a Japanese game, the result seems to tell us that players are prioritizing cuteness, something which I noted with great interest.
Can you think of a better way to add cuteness to the game and invoke the spirit of classic Final Fantasy than to add unique Moogles? Everyone likes Moogles. 
What are your thoughts on ways the Moogles of Eorzea can be made more interesting?