It has the same balance issues as Hearthstone. CPU opponents in Story mode cheat by combining more than 1 type of class in a deck, allowing the combining of effects that the player will never have access to. Also, it was stated that this game would rely a lot less on RNG effects but there still are too many. You also HAVE to use a class' meta in order to get the full potential of that class or else you won't win except by luck.