>>/82077/
smh
They added an item to the Hollow Zero shop a few updates back that you can exchange for the mats the beeg bosses drop. Which is especially nice cause the new one is story locked, so I was able to level up Miyabi's skills before I did the story. They also added the hamster cage to the hollow zero shop with this update. 
With the gold discs I was able to get a full set for Miyabi without touching the new disc stages, although it is not min-maxed. 
Probably depends on whether or not we get another "Frost" character or if it just remains something unique to Miyabi.
Oh yeah, those.

I started it, got a few missions in and took a break. I would say its good so far.