As for the new power, I think Lorne is right. It's probably just a Macguffin. At most, It might be a modular one-off purchasable that allows you to do something interesting with the Force, but I doubt it will be much more than that.
If it's cast as a reward from a mighty quest, and thus a GM resource, it could be game-breaking as a Rod of Seven Parts where each part has a tiny Deck of Many Things hidden inside, and the meta-game at large would be mostly untouched.