I do still enjoy playing. However the primary issue this game has is there is no sense of progression. Crystals and Jewels are far more valuable than packs. What I mean by this is the potential Crystals and Jewels represent is more valuable than what you get, since it is nearly always a pack of dups, which then translates to runes which then translates to NOTHING.
Unless they introduce a mechanism toward progression like being able to use runes to build/buy the card(s) you are wanting to complete your dream deck we are going to caught in this trap. There is no end game and there is no sense of progress that can be measured. Nearly all other games have a way to progress, with this game it is 100% pure random luck and you can easily find yourself spending time and crystals (potentially money) to buildup to 400 jewels and then get yet another dup. The more complete your collection the higher your chances are you will gain nothing from playing the game. This lack of progress is a challenge the Dev's need to recognize and address. The other CCG have addressed this by allowing you to build to rarer cards. Hopefully they will check some of these other games out and learn from them.