The game looks great, the game sounds great, and the game feels great! Visually speaking, the design of characters, ally and enemy alike, are very compelling and really push this pixel art style to the max. Each card has good, and visually distinct, artwork, making it smooth to recognize each card at a quick glance. The visual and audio effects of playing cards are done well too; cards sound weighty, both in your hand and when played; the cards are free of visual clutter and have all the pertinent information cleanly arranged; they are able to be tilted around to provide a sense of depth to them. All in all, deckbuilder mechanics all seem sound and clean and well-desinged.
As for the boards/tactical elements, from my experience thus far they are also very enjoyable. Boards immediately invoke that classic FF Tactics feel, although the deckbuilder stylings present a whole fresh outlook on the tactical choices players must make. There are small details done right, such as the sound of water rippling when it is present. Enemies have highly variable movesets which means that navigating the terrain effectively to defeat them is critical.
Overall, design decisions are very creative and compelling. Even in the first few encounters, multiple concepts and keywords were introduced that I've never seen before, a testament to the creativity at work here. Highly, highly recommend!