Endwalker AST has too many buttons, and it is unnecessary. The Draw action should change to the drawn card so that it can be played, like in Heavensward, to avoid having a second Play button. Likewise with Major Arcana, the action should change to the drawn card. The extra two Play buttons makes hotbar layout awkward.
Additionally, the ground target area for Earthly Star is way too big. Even if the star effects this area, the placement target should be small, the size of the star itself, similar in size to Ninja's Shukuchi. The affected area can be easily seen by the star particles once the star is placed down. The massive ground target makes it difficult to accurately position the star, and is hard on the eyes / looks messy when placing.
EDIT: Another BIG problem I am finding while playing AST is that there is no way to use unwanted cards. Before, Minor Arcana would convert the card and not affect seals, this was crucial to getting all three seals. Minor Arcana just doesn't feel satisfying to use anymore. There has always been a way to use unwanted cards, be it Royal Road back in HW/SB, or Minor Arcana in ShB, but now I feel forced to use a card I don't want, or to Undraw and waste the cooldown.