Unresponsive, laggy AI on android, during multiplayer or Co-op with a big team, It's much more responsive in single player, specialy on a lower end devices.
Furthermore, there should be an option to clone buttons on a touchscreen, for convenience.
I personaly play on S20. It is absolutely tedious once you set up your screen with the layout you desire. The whole screen is covered in buttons, you can't see anything, or you have limited vision, which is lethal in pvp combat.
The mythic skill drum, to activate it, you need to hold the mythic skill button, then swipe in direction of the desired mythic skill, which is insane to do in a fast paced combat. Specialy in multi player.
It is often UI buttons overlap, which can make you do errors in your rotation.
If fighting a player on console or pc, you have a clear disadvantage, asuming your skills are similar.
I also noticed delays in a guild base which has multiple objects placed. Also kaifeng city, since it's an object dense location. It makes combat unresponsive and laggy.
Needs to be optimized.
Lower rez textures, effects, shadows for lower end devices will help with preformance.
It would be cool if it was posible to visualy disable player made structures, to avoid prefformance issues and lags in the guild base.