Very cool game, a strong design with nice polish.
Not being able to totally 'choose' what deck you play with game-by-game is a bold choice. It prevents strict meta-decks from emerging and forces you to come up with a different game plan every game. It feels extra nice when you get a game with a killer combo. On the other hand it makes the game feel slightly more weighted towards luck than skill, but whether that's good or bad is a matter of personal taste.
The art and theme I thought was a bit weak at first, but it's grown on me. Kudos for crediting every photographer!
Having to grind games to unlock cards is a bit annoying, but I'm going to play the game that much anyway, so I don't mind being drip-fed content.
Again; a really deep, fun, and polished game.