Sadly, many people have complained about this and nothing has been done. I doubt they'll do anything about it but I hate that it's like this currently. It makes the Judge Vegg fight look sloppy.
I agree, something needs to be done about this. Along with reworking polymorph spells in general, because they're extremely rare to see. I've been playing for years now and absolutely no one uses moon spells, even the 3 pip ones from Khrysalis. It's a shame since the moon spell animation is quite lovely and I would love to see it utilized more often!
Although I'm glad they're used in a Karamelle fight, but regardless, no one seems to care for moon spells.