Love the concept - got pretty hooked this afternoon. I think i better take a break now though.
Here some thoughts:
All the 2d art is super charming and even though the 3d doesn't look bad at all, i feel there is at least a slight disconnect in style.
It would be great if we could adjust keybinds for the camera and formations in the settings. The controls work but feel kinda unfamiliar to me.
Balance felt fine especially for such an early version.
My biggest nitpick is that rerolls quite often don't seem to really "roll". The die does a 360 then returns to what it was before - this might be coincidental but player mentality will say "this is unfair".
Feature suggestion: Make perks in the shop lockable so they appear again after the next battle. This would also allow more design space for expansive but powerful perks.
All in all this demo (V0.0.8) plays really fun already - will definitely check later updates.