do Du think there should be a keyblade that saves peoples hearts?

FOr my fanfic Kingdom spades, I created the keyblade "Savior of hearts" with the special power to combine heartless and nobodies into "Spadesters" which when defeated, saved the persons heart, and gave half of it to the persons nobody, thus, making it impossible to turn back into a heartless due to the lack of a full heart. But still as if they never Lost the half in the first place.

does'nt this seem like something that should happen in Kingdom hearts if there was a Kingdom hearts three? not the spadester thing, just a way to save the people who are heartless instead of have to destroy them. Just sayin, it would be alot easier...... and it would give the nobodies what they always wanted......sort of....