They fixed most of the UI issues I had with it early on. There is a lot to grasp with the core concepts of the game itself (i.e. cards can be revealed, discarded, recharged, buried, or banished), but it's a very deep experience once you grasp the basics. Understandably that might not be everyone's cup of tea, though.
They released a new content update for the last chapter of the game just before the holidays, but it unfortunately had the side effect of causing the quest mode to bug out for some players. Their dev team then went on vacation, so in hindsight it probably wasn't the best timing. It's been pretty solid otherwise though, and the core campaign mode still works.