Reading about your Moonfolk idea, I want to point out: "Soratami" is the Kamigawa name for their Moonfolk, the same wai "Akki" is their name for Goblin or "Kyren" is a Mercadian form of Goblin or "Merrow" are what Merfolk are called on Lorwyn. It's a local variant of a broader race. Sometimes it makes sense to bring such a variant back, but since this is the first time Moonfolk appear outside Kamigawa it might be a good idea to break the mold and make Tuvian Moonfolk more distinct.
Reading about your Moonfolk idea, I want to point out: "Soratami" is the Kamigawa name for their Moonfolk, the same wai "Akki" is their name for Goblin or "Kyren" is a Mercadian form of Goblin or "Merrow" are what Merfolk are called on Lorwyn. It's a local variant of a broader race. Sometimes it makes sense to bring such a variant back, but since this is the first time Moonfolk appear outside Kamigawa it might be a good idea to break the mold and make Tuvian Moonfolk more distinct.