Hey, I haven't seen a lot of tactics games, kudos for taking on such a challenging genre! The game looks really good, I would focus on making the UI super quick and user-friendly moving forward, as that's critical for making a game like this play smooth.
Check out our game Einnsámr, it's got a lot of tactics elements as well :) https://itch.io/jam/gmtk-2019/rate/463168