No battery optimization. So simple, yet it can kill a full battery in an hour. Add to that the cheaters(full 50/50 teams on round 12). The concept of the game is great, the implementation in this instance is not. The game knows before a round starts who the winner is, it intentionally matches u against teams it knows u will loose against. This goes for arena or public versus. Let's not even get into the not so random RNG, it makes sure u won't get the pets u want to upgrade until u sell them.