HONK mimimimimi.   HONK mimimimimi.
Can you hear that?  That's the sound of me sleeping on GHAZ.
While GHAZ is a great core, people are making it out to be The One and Only Balance Core.  That's far from the truth.  The Yveltal and Ultra Necrozma that people fear are, in my opinion, very overblown.  And two Pokemon of the core I find it surprisingly difficult to fit on teams that I am building from the ground up.  Arceus Dark and Arceus formes in general are things I find very similar to Zygarde in terms of how much I don't actually want or need to run them.  In terms of an Ultra Necrozma check, I find Yveltal and Marshadow to be a lot more valuable.  Condensing a Yveltal and Ultra Necrozma check is still amazing, but I don't think this Pokemon is quite as good as people say.