Funny thing, I spent HOURS racking my brain trying to figure out why Radz-at-Han's theme sounded so familiar... and then I rewatched the trailer for an unrelated reason and it hit me lol

Whether it means SOMETHING, I'm not sure. Rhalrg's Reach used The Measure of His Reach, and both the Crystarium and Eulmore use variations of Tomorrow and Tomorrow. I don't recall if we know the name of EW's theme yet.

Old Sharlayan's reminds me of traditional Greek music, with a more Fantasy touch, while Radz-at-Han's is certainly Indian-inspired, probably to point at their respective inspirations.