Constant glitching
I hate that the game starts to glitch if it is open longer than a half hour or if my battery is under 40%. Start a fight and glitch out so you loose entry resources and half the time any progress. At least a few years ago if the game glitched and crashed then you got your resources back but because people started closing out as a cheat now you loose your resources when it is the game's fault.
This Dimensional Arcade is the worst at it, Battlegrounds second. Pretty much anything that takes more than 10 minutes breaks the game.
A 3 year old iPad should have the juice to play this game. Maybe scrub some of the fat in the game, like the waist of time changes that are not much fun unless you are an advanced player.