I might try to make the glowing effect more intense and see how that looks. I actually have it oscillate more rapidly when it is in Ben’s hand, as if the lightsaber is adjusting to Ben’s intensity.
I’m not sure what would be a good alternative effect that could be applied to the lightsaber. Since the instability of the Kylo Ren blade has some symbolic meaning, I feel the Skywalker Saber effect should have some equivalent symbolism for Rey’s state of being.