I think the only change needed is faster exp gain at higher levels. I'm quitting the game because I've reached level 12 and don't want to grind to unlock the last few campaigns. If I had more cards and more warlords I could be content with pvp.
I was playing on festive-perlman, and after 4 reincarnations, the cities all switched loyalties and the game permanently paused. Exporting and loading the game can show the moment before the glitch and the glitch. If you're the developer, hit me up and I'll give you the save file so you can try and debug the issue. It completely ruined my experience of what is otherwise the best html game I've found.