The one point I concerned was that all things Melody done would be credit to Luciana, but since Luciana herself was not that good, in the end, it might be bad for her (like how the guy thought she can perceived malice but actually it’s not her own ability).
As long as she gets to keep her magnificent maid, it might as well count as her own ability.
(And even if she doesn't - she's been shown to be smart so this spell might end up being just like training wheels, something that teaches her the art.)