The only problems I have that makes me not want to continue to play are the insanely crazy quests in the event section, and the times it bugs out.
Two times, I had a victory in the tower and the game bugged out, then made me reload the screen, then told me I lost the match both times.
The worst thing that has happened is that I got a really rare gold chest, and when I opened it, the game froze, made me reload the screen, and just made the chest disappear without giving me anything that was inside it. That really pissed me off.
I understand this is a freemium game, and the goal is to make people pay microtransactions, but to eliminate a chest that takes 30h to load, and only shows up ever few hundred tower battles because the game bugs out when the chest is opened is just bad sportsmanship.
I like the new avatar better than the older one.
The game is still addictive, but its grip is waning since I have to wait more frequently for chests to unlock, and just to have little progress (but I suppose that is the draw for the $5-$20 packages, which is how you guys make money).