I quit playing in part because of the ridiculous mat system.  Imo this is a potentially big game being held back by the fact that the material system makes it impossible to try new cards in your deck, let alone switch classes without grinding like crazy for three weeks to try and catch up.   It’s just so boring.  What card game do you know that you can only basically use the cards you used on rank 20 as rank 45?  

The problem is the game is by definition never going to change for each individual player.  You’ll play the same cards in the same order against the same decks over and over just so you can get a pvp pack that gives you none of the mats you need. 

Between the mats and the locker system which is clearly not random and rigged to get you to spend as much money as possible, the game goes from like a 4/5 to like a 2/5.   It’s fun but you hit a big wall once you beat pve and get to rank 40 or so, and I don’t mean in difficulty, I mean from there on out it’s very clear you will be playing to the same deck against the same decks over and over.