Pretty neat for a tech demo.
It's hard to know what feedback is even useful at this stage but the first thing I noticed is that when indicating hit/required positions the tooltips should show all the positions.
For example pocket sand says it hits two adjacent targets but it doesn't show that they're position 3 and 4, DD uses dim dots to also show the positions which aren't hit so there's no confusion.
I used riposte and instead of my rogue getting the riposte status it gave it to the enemy.
Other than that the combat itself was good, I'm looking forward to see how it deviates from DD