I just got into this. So far I'm not having fun. It feels like one of those pay-to-win card games. Even when I click on match against someone of my skill level (all I have is the initial hero and the default deck), it matches me up against someone fully loaded. I don't feel like my personal skill level or knowledge of games is of any value. The best thing I can do would be to play a lot of games and pay to win in the arena so I could unlock yet more cards. Presumably, to bully somebody with worse cards.
It's just not fun.