I have actually been playing this in between my mad bouts of Sekiro... I'm a good ways into Chapter 3. I got stuck on the Machina Madness missions because I kept failing to get the Rikku scene I'll need to make it easier to pin her as the culprit in the mystery mission in the next chapter. I need that Ragnarok accessory because it's shiny and I want it. So having to redo that mission a few times left me little time to go further than I wanted. I did get to spend more time with Dark Knight, Alchemist, and Lady Luck classes, as well as earn Seed Shot and White Wind for the Gun Mage classes. I'll probably write up a thing about the three of them soon. From the look of my guide, it seems like Chapter 3 is when the game just starts handing out dresspheres left and right because by my account, I have three more heading my way very soon.

I haven't even touched the Special Dresspheres, mainly because I remember them being kind of crappy for the amount of effort it takes to summon them and some of their stats seem to be based on how many dresspheres you transformed into before being able to use them. I'll likely wait until the end of the game to really play with them.