I just started recently but after getting to max and doing some of the big world events and bosses I would love an option to turn down or off other people's particle effects. Its a crazy light show which looks cool but I cant tell what is happening most of the time due to it. Another thing would be to hide weapons when sheathed. Its not really a big deal but it would let some armor sets look more impressive without a big honking greatsword blocking out the view.