i just lost a game based on a 10% miss chance, after gaining the upper hand using superior strategy. that's my gripe with the "luck" aspect of the game
i like the game, but i really dislike how much luck is involved. there is a lot of strategy when sparring with an opponent to be energy efficient, and too often after gaining the upper hand i will have an attack miss. most attacks should have a 100% hit rate. there is no reason to have 10% miss rates.
there is a pregame bug that causes you to lose a game if you ready up and then leave. if the timing is just right, you still enter the game and lose it. this happens to me when i decide on a different deck.