Posted this in another thread, I feel it's relevant here too:

I just don't get why people are so against using large creatures as mounts. And don't even say "it's becoming WoW!" because we all know that's not true. As long as the monsters don't get obnoxious elemental effects and become all multi-colored I think we'll be fine and well within the realm of what's acceptable for FFXIV.

The "It's not traditional FF!" excuse doesn't really hold much weight either anymore. FF is not a series that strictly sticks to only tradition and nothing else. There are new features or new takes on old features with every iteration, the series wouldn't be able to last long without doing so. Especially for an MMO, this game needs to branch out and do everything it can to keep people interested.

If the monster is big enough for me to throw a saddle on and ride, outside of lore reasons (like NMs or Primals), I don't see why we shouldn't be able to. I mean a drake is big enough to ride and any race of character can fit on it, so it only makes sense for us to make use of it as a mount. Hell they could even make a quest out of it since it may not be a company issued mount. The concept actually fits a little better into FFXIV's lore than anything since Ishgard's keeping their monopoly on Chocobos. In light of that, adventurers should be free to get creative.
Also it seems like they're mostly done with actually creating the feature so I'd say get used to it because it's coming either way.