It is the way of keeping people chasing after things without having a power creep in the game. Nothing more. You are correct the weapons will be just the same with a new skin. We have gained no ground against the enemies so far and we won't now but since they allowed update of weapons in the last DLC and no one chased the new junk with shank burn they decided to just end it. Not a good way to go about things but it is their sand box and I guess if we don't like it we will just have to move on. As far as I know I am still in for another round but have not and will not pre-order. Want to know a lot more before I send any more money down the line on the game.