The lore, characters design and art are overall excelent. The combat is dynamic but I think the player has access to too many damage options (special, strikes, perhaps a charged strike, callings, casts and even dash damage) and maybe removing one or two would make the gameplay smoother, specially when you're starting to play the game.
The gameplay loop however, is kinda underwhelming after a while. A run consists in 4 zones with 4 bosses at the end, which kinda get easier once you get upgrades on the mirror, but they're always the same zones and the same bosses (with slight changes). Once you beat the game, you can play again with "heat" to slightly increase the difficulty and keep getting rare items to continue upgrading stuff, but then again is really just the same thing. There's not much difference from run to run, appart from the 6 different weapons and certain upgrades and boons that really impact the gameplay, but appart from that you're doing the same thing over and over. This game really needs a DLC or something to add more content or maybe change the boons and upgrades to make them more synergistic and give the player more options to develop builds and combos.