What about adding Vanquishing (Similar to GW 1) into GW 2? It may work next way: You talking to npc in LA or any other city and selecting Vanquish option and then choose the map u havent done in this mode before. Then u get teleported to instanced version of the map (Queensdale, Cursed Shore or whatever you choose) and will have to clear all the mobs (which will be much harder than in normal open-world version). You may connect to this mode achievements, unique skins or tokens for vanquishing which u trade for precious items like skins or t6 materials or anything else.