• Low level Itemization
• Mounted Combat lag/physics
• Some Boss-Fights have over complicated mechanics and are lacking character (Draigoch is great btw, Dúrchest ...not)
• Trashloot (especially in Moria but also the amount of recipies and legendary weapons. Why not only 1 container per tier and a small amount of shards instead of weapons?)
• User Interfaces (Task Window, Small resolution of Maps and Login Screen, Vendor Interface)

There are other things I wish to have ingame, but I wouldn't say that this annoys me.