Glaringly obvious for me at least is matchmaking on all game types. Similar in style to borderlands 2. If you want it on you turn it on and others who goto the same level/mission as you and also have it turned on drop into your fire team. Second would be allowing year one weapons to have a place in year two. I realize this is most likely not done because of balance issues and it was easier to just drop the curtain down on year one and start fresh but what if you gave a year one gun to the gunsmith for him to upgrade to year two style and receive a year two version of the gun on armsday with whatever balance issues fixed.