Everyone should keep in mind that this is just an inkling of things to come. For all we know, there's a couple Xaela tribes that have been hanging about Abalanthia's Spine fighting Warriors and the other Xaela clans for cycles now, but were mostly ignored because it's happening "way over there." Maybe some of them HAVE migrated to the floating islands of Heavensward, fighting over a hunk of floating rock to claim it as their own.
We don't have any lore yet dictating why there can't already be a couple tribes in Eorzea that are just in some out-of-the-way area people haven't been to yet.
I like to think that it's all just to help refining some ideas or perhaps inspire new ones to play with as the release date draws closer. Don't give up on your concepts just yet, or feel like you have to pigeonhole yourself into one background due to a few offered tidbits - there's probably still going to be a way to make it work! ... Even if it's a half-Magitek Xaela made by Garleans to deal with the Au Ra tribes that escaped the razing.
We don't have any lore yet dictating why there can't already be a couple tribes in Eorzea that are just in some out-of-the-way area people haven't been to yet.
I like to think that it's all just to help refining some ideas or perhaps inspire new ones to play with as the release date draws closer. Don't give up on your concepts just yet, or feel like you have to pigeonhole yourself into one background due to a few offered tidbits - there's probably still going to be a way to make it work! ... Even if it's a half-Magitek Xaela made by Garleans to deal with the Au Ra tribes that escaped the razing.