User blog comment:Miskos3/Fairy Tail Chapter 419: The Message of Fire, Review/@comment-77.194.131.61-20150208112159/@comment-7418318-20150208113021

I'd rather have her discover how to use the "Aquarius mode" at will and maybe become able to telepathically communicate with Aquarius in the Celestial Spirit World like we've seen her do with Loke on Tenrou than getting a new key for Aquarius.

Also I wouldn't like it one bit of she just got a new key for Aquarius. If that key is restored, it should at the very least be in a mini-arc dedicated to exactly this goal and not a side-story happening in an arc about something else.