I guess? The point is to not rehash old things. Having it be the Lunar Whale, which we find deep in the sea (of clouds), that takes us to the moon, would be pretty stale. Of course it's Allagan tech because what isn't, but besides that it'd be a carbon copy of the IV Lunar Whale.
It's not so much a lack of faith to the original game, but a desire for it to be something new and unique instead of relying on old concepts.