I was sold on this the moment you announced it in Discord and I am not disappointed at all. Very unique and creative. I do miss some elements of OoG but there's a lot of fun secrets to find even just in the demo and lots of fun transformy things.
I do seem to have fully lost Luna's Sheath though. I think I lost it to the boss on floor 8 but I've not seen it show up anywhere since. I'd really like a little hint or reminder when entering a floor that has something you can rescue present, largely just so I can figure out if it's bugged or I'm just bad at spotting them. The colored lights tend to help but does not seem to be working here.
Spellcasting feels pretty bad without upgrades but maybe I'm just missing something. I did most the game with Synthesis spam.
It's a bit of a shame you don't get to see people get transformed in a lot of cases. You do get to see them when you make your way back but that is after the fact, and it's not quite as much fun. That being said considering they are already transformed when you start I'm not sure how much it could show.
It would also be nice to have something to pass turn or surrender so you can see what happens in some places even after you've bought all the upgrades.
Either way I'll be buying it when it's full released.