And unavoidable wipes due to poor or inexistent testing of affixes in the “new” dungeons (Flame Wreath and Storming I’m looking at you)… that are only fixed after the week is over (like Quaking and Bombardment in ID or defeated opera mobs still triggering explosives).
Slopes and horizontal textures
Water and carpets hiding important textures like quaking or bad AoE on the ground
Train walls where I’m more fighting against my camera than the mobs themselves
Basically, this season has been a perfect example of how to NOT playtest things.